50736
2018
2018
eng
3011
3022
12
3
482
article
Oxford Univ. Press
Oxford
HESS Collaboration
1
2018-10-05
2018-10-05
--
VHE gamma-ray discovery and multiwavelength study of the blazar 1ES 2322-409
A hotspot at a position compatible with the BL. Lac object 1ES 2322-409 was serendipitously detected with H.E.S.S. during observations performed in 2004 and 2006 on the blazar PKS 2316-423. Additional data on 1ES 2322-409 were taken in 2011 and 2012, leading to a total live-time of 22.3 h. Point-like very-high-energy (VHE; E > 100 GeV) gamma-ray emission is detected from a source centred on the IFS 2322-409 position, with an excess of 116.7 events at a significance of 6.0 sigma. The average VHE gamma-ray spectrum is well described with a power law with a photon index Gamma = 3.40 +/- 0.66(stat) +/- 0.20(sys) and an integral flux Phi(E > 200 GeV) = (3.11 +/- 0.71(stat) 0.62(sys)) x 10(-2)cm(-2)s(-1), which corresponds to 1.1 per cent of the Crab nebula flux above 200 GeV. Multiwavelength data obtained with Fermi LAT, Swift XRT and UVOT, RXTE PCA, ATOM, and additional data from WISE, GROND, and Catalina are also used to characterize the broad-band non-thermal emission of lES 2322-409. The multiwavelength behaviour indicates day-scale variability. Swift UVOT and XRT data show strong variability at longer scales. A spectral energy distribution (SED) is built from contemporaneous observations obtained around a high state identified in Swift data. A modelling of the SED is performed with a stationary homogeneous one-zone synchrotronself-Compton leptonic model. The redshift of the source being unknown, two plausible values were tested for the modelling. A systematic scan of the model parameters space is performed, resulting in a well-constrained combination of values providing a good description of the broad-band behaviour of 1ES 2322-409.
Monthly notices of the Royal Astronomical Society
10.1093/mnras/sty2686
0035-8711
1365-2966
wos:2019
WOS:000462312600014
Arrieta, M (reprint author), Univ Paris Diderot, LUTH, Observ Paris, PSL Res Univ,CNRS, 5 Pl Jules Janssen, E-92190 Meudon, France.; Cerruti, M (reprint author), Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France.; Lefaucheur, J (reprint author), Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France., arrieta.hess@hess-experiment.eu; cerruti.hess@hess-experiment.eu; lefaucheur.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science AMP; Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA); National Science FoundationNational Science Foundation (NSF); National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA) [NNG05GF22G]; U.S. National Science FoundationNational Science Foundation (NSF) [AST-0909182, AST-1313422]; Paris Science et Lettres (PSL) foundation; EU FP7 Marie CurieEuropean Union (EU) [PIEF-GA-2012-332350]
2021-05-19T07:08:34+00:00
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Arrieta, M; Cerruti, M.; Lefaucheur, J.
false
true
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Dei
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
J. Dyks
Kathrin Egberts
G. Emery
J. -P. Ernenwein
S. Eschbach
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
Matthias Füssling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
R. R. Kruger
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Lopez-Coto
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitche
R. Moderski
M. Mohamed
L. Mohrmann
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V. Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
F. Spanier
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
Iurii Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
A. Woernlein
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
galaxies: active
eng
uncontrolled
BL Lacertae objects: individual: 1ES 2322-409
eng
uncontrolled
gamma-rays: galaxies
Astronomie und zugeordnete Wissenschaften
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
48806
2019
2019
eng
19
627
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2019-07-16
2019-07-16
--
Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE gamma-ray observations with HESS
The flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (100MeV < E < 100 GeV) gamma-ray band, which is continuously monitored with Fermi-LAT. During two periods of high activity in April 2014 and June 2015 target-of-opportunity observations were undertaken with the High Energy Stereoscopic System (H.E.S.S.) in the very-high-energy (VHE, E > 100 GeV) gamma-ray domain. While the observation in 2014 provides an upper limit, the observation in 2015 results in a signal with 8 : 7 sigma significance above an energy threshold of 66 GeV. No VHE variability was detected during the 2015 observations. The VHE photon spectrum is soft and described by a power-law index of 4.2 +/- 0.3. The H.E.S.S. data along with a detailed and contemporaneous multiwavelength data set provide constraints on the physical parameters of the emission region. The minimum distance of the emission region from the central black hole was estimated using two plausible geometries of the broad-line region and three potential intrinsic spectra. The emission region is confidently placed at r greater than or similar to 1 : 7 X 1017 cm from the black hole, that is beyond the assumed distance of the broad-line region. Time-dependent leptonic and lepto-hadronic one-zone models were used to describe the evolution of the 2015 flare. Neither model can fully reproduce the observations, despite testing various parameter sets. Furthermore, the H.E.S.S. data were used to derive constraints on Lorentz invariance violation given the large redshift of 3C 279.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201935704
1432-0746
wos:2019
A159
WOS:000475554500004
Zacharias, M (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.; Romoli, C (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Wierzcholska, A (reprint author), Inst Fizyki Jadrowej Pan, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.; Jankowsky, F; Wierzcholska, A (reprint author), Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation [CNRS/IN2P3]; (CNRS/INSU)Centre National de la Recherche Scientifique (CEA)French Atomic Energy Commission; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; University of Amsterdam; EGI Federation; Polish National Agency for Academic Exchange (NAWA); National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA)
2021-01-06T17:20:15+00:00
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5aac9e03e143be24c67b452264b54ba2
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Hassan E. Abdalla
R. Adam
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
H. Ashkar
M. Backes
V. Barbosa Martins
M. Barnard
Y. Becherini
D. Berge
K. Bernloehr
R. Blackwell
M. Böttcher
C. Boisson
J. Bolmont
S. Bonnefoy
J. Bregeon
M. Breuhaus
F. Brun
P. Brun
M. Bryan
M. Büchele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
T. Chand
S. Chandra
A. Chen
S. Colafrancesco
M. Curylo
I. D. Davids
C. Deil
J. Devin
P. DeWilt
L. Dirson
A. Djannati-Ata
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
K. Feijen
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
Matthias Füßling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
M. Jamrozy
D. Jankowsky
F. Jankowsky
A. Jardin-Blicq
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
D. Kostunin
M. Kraus
G. Lamanna
J. Lau
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
C. Levy
T. Lohse
I Lypova
J. Mackey
J. Majumdar
D. Malyshev
V Marandon
A. Marcowith
A. Mares
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
C. Moore
E. Moulin
J. Muller
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
M. Ostrowski
I Oya
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Pühlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
Q. Remy
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schüssler
A. Schulz
H. Schutte
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
T. Tavernier
A. M. Taylor
R. Terrier
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van Der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. White
A. Wierzcholska
R. Yang
H. Yoneda
Michael Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
A. Ziegler
J. Zorn
N. Zywucka
M. Meyer
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
quasars: individual: 3C 279
eng
uncontrolled
galaxies: active
eng
uncontrolled
relativistic processes
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
53086
2018
2018
eng
8
612
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2018-04-09
2018-04-09
--
Extended VHE gamma-ray emission towards SGR1806-20, LBV 1806-20, and stellar cluster Cl*1806-20
Using the High Energy Spectroscopic System (H.E.S.S.) telescopes we have discovered a steady and extended very high-energy (VHE) gamma-ray source towards the luminous blue variable candidate LBV 1806-20, massive stellar cluster Cl* 1806-20, and magnetar SGR 1806-20. The new VHE source, HESS J1808-204, was detected at a statistical significance of >6 sigma (post-trial) with a photon flux normalisation (2.9 +/- 0.4(stat) +/- 0.5(sys)) x 10(-13) ph cm(-2) s(-1) TeV-1 at 1 TeV and a power-law photon index of 2.3 +/- 0.2(stat) +/- 0.3(sys). The luminosity of this source (0.2 to 10 TeV; scaled to distance d = 8 : 7 kpc) is L-VHE similar to 1.6 x 10(34)(d = 8.7 kpc)(2) erg s(-1). The VHE gamma-ray emission is extended and is well fit by a single Gaussian with statistical standard deviation of 0.095 degrees +/- 0.015 degrees. This extension is similar to that of the synchrotron radio nebula G10.0-0.3, which is thought to be powered by LBV 1806-20. The VHE gamma-ray luminosity could be provided by the stellar wind luminosity of LBV 1806-20 by itself and/or the massive star members of Cl* 1806-20. Alternatively, magnetic dissipation (e.g. via reconnection) from SGR 1806-20 can potentially account for the VHE luminosity. The origin and hadronic and/or leptonic nature of the accelerated particles responsible for HESS J1808-204 is not yet clear. If associated with SGR 1806 20, the potentially young age of the magnetar (650 yr) can be used to infer the transport limits of these particles to match the VHE source size. This discovery provides new interest in the potential for high-energy particle acceleration from magnetars, massive stars, and/or stellar clusters.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201628695
1432-0746
wos:2018
A11
WOS:000429404700011
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; Australian Research CouncilAustralian Research Council; University of Namibia
2021-12-10T09:23:43+00:00
sword
importub
filename=package.tar
77b7b533abb80a93e50034bb2415b491
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Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
E. O. Anguener
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
E. Birsin
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
M. Grudzinska
D. Hadasch
J. Hahn
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
E. Leser
T. Lohse
M. Lorentz
R. Liu
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
I. Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
R. Tuffs
J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
stars: magnetars
eng
uncontrolled
stars: massive
Physik
Institut für Physik und Astronomie
Import
49065
2019
2019
eng
11
626
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2019-07-12
2019-07-12
--
Upper limits on very-high-energy gamma-ray emission from core-collapse supernovae observed with H.E.S.S.
Young core-collapse supernovae with dense-wind progenitors may be able to accelerate cosmic-ray hadrons beyond the knee of the cosmic-ray spectrum, and this may result in measurable gamma-ray emission. We searched for gamma-ray emission from ten super- novae observed with the High Energy Stereoscopic System (H.E.S.S.) within a year of the supernova event. Nine supernovae were observed serendipitously in the H.E.S.S. data collected between December 2003 and December 2014, with exposure times ranging from 1.4 to 53 h. In addition we observed SN 2016adj as a target of opportunity in February 2016 for 13 h. No significant gamma-ray emission has been detected for any of the objects, and upper limits on the >1 TeV gamma-ray flux of the order of similar to 10(-13) cm(-)(2)s(-1) are established, corresponding to upper limits on the luminosities in the range similar to 2 x 10(39) to similar to 1 x 10(42) erg s(-1). These values are used to place model-dependent constraints on the mass-loss rates of the progenitor stars, implying upper limits between similar to 2 x 10(-5) and similar to 2 x 10(-3) M-circle dot yr(-1) under reasonable assumptions on the particle acceleration parameters.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201935242
1432-0746
wos:2019
A57
WOS:000471213000003
Simoni, R; Vink, J (reprint author), Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands.; Renaud, M (reprint author), Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France.; Maxted, NI (reprint author), Univ New South Wales, Australian Def Force Acad, Sch Sci, Canberra, ACT 2600, Australia.
University of Namibia; German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation; Centre National de la Recherche Scientifique (CNRS/IN2P3); Centre National de la Recherche Scientifique (CNRS/INSU)Centre National et aux energies alternatives (CEA)French Atomic Energy Commission; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; South African Department of Science and Technology; National Research Foundation; National Commission on Research, Science & Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam
2021-01-25T11:16:48+00:00
sword
importub
filename=package.tar
dcb1217ebec90fa297d62a67b2f6255c
Simoni, R; Vink, J.
false
true
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
E. O. Anguener
M. Arakawa
C. Arcaro
C. Armand
H. Ashkar
M. Backes
V. Barbosa Martins
M. Barnard
Y. Becherini
D. Berge
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
J. Bregeon
M. Breuhaus
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
T. Chand
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
M. Curylo
I. D. Davids
C. Deil
J. Devin
P. de Wilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-p Ernenwein
S. Eschbach
K. Feijen
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
M. Jamrozy
D. Jankowsky
F. Jankowsky
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
D. Kostunin
M. Kraus
G. Lamanna
J. Lau
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
C. Levy
T. Lohse
R. Lopez-Coto
I Lypova
J. Mackey
J. Majumdar
D. Malyshev
V Marandon
A. Marcowith
A. Mares
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
J. Muller
C. Moore
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
M. Ostrowski
I Oya
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
Q. Remy
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
H. Schutte
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
T. Tavernier
A. M. Taylor
R. Terrier
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. White
A. Wierzcholska
R. Yang
H. Yoneda
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
A. Ziegler
J. Zorn
N. Zywucka
N. Maxted
eng
uncontrolled
gamma rays: general
eng
uncontrolled
supernovae: general
eng
uncontrolled
cosmic rays
Astronomie und zugeordnete Wissenschaften
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
34960
2013
2013
eng
8
554
article
EDP Sciences
Les Ulis
HESSCollaboration
1
--
--
--
Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9-185406
The detection of the high-frequency peaked BL Lac object (HBL) SHBL J001355.9-185406 (z = 0.095) at high (HE; 100 MeV < E < 300 GeV) and very high-energy (VHE; E > 100 GeV) with the Fermi Large Area Telescope (LAT) and the High Energy Stereoscopic System (H.E.S.S.) is reported. Dedicated observations were performed with the H. E. S. S. telescopes, leading to a detection at the 5.5 sigma significance level. The measured flux above 310 GeV is (8.3 +/- 1.7(stat) +/- 1.7(sys)) x 10(-13) photons cm(-2) s(-1) (about 0.6% of that of the Crab Nebula), and the power-law spectrum has a photon index of Gamma = 3.4 +/- 0.5(stat) +/- 0.2(sys). Using 3.5 years of publicly available Fermi-LAT data, a faint counterpart has been detected in the LAT data at the 5.5 sigma significance level, with an integrated flux above 300 MeV of (9.3 +/- 3.4(stat) +/- 0.8(sys)) x 10(-10) photons cm(-2) s(-1) and a photon index of Gamma = 1.96 +/- 0.20(stat) +/- 0.08(sys). X-ray observations with Swift-XRT allow the synchrotron peak energy in vF(v) representation to be located at similar to 1.0 keV. The broadband spectral energy distribution is modelled with a one-zone synchrotron self-Compton (SSC) model and the optical data by a black-body emission describing the thermal emission of the host galaxy. The derived parameters are typical of HBLs detected at VHE, with a particle-dominated jet.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201220996
0004-6361
wos:2011-2013
A72
WOS:000320444200071
Biteau, J (reprint author), Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France., biteau@in2p3.fr; david.sanchez@mpi-hd.mpg.de
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Particle Physics and
Astronomy Research Council (PPARC); IPNP of the Charles University;
South African Department of Science and Technology; National Research
Foundation; University of Namibia; National Aeronautics and Space
Administration; Istituto Nazionale di Astrofisica in Italy; Centre
National d'Etudes Spatiales in France
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
D. Goering
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
D. Nedbal
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spiess
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
BL Lacertae objects: individual: SHBL J001355.9-185406
eng
uncontrolled
gamma rays: general
Institut für Physik und Astronomie
Referiert
34778
2013
2013
eng
1889
1901
13
3
434
article
Oxford Univ. Press
Oxford
HESS Collaboration
1
--
--
--
HESS and Fermi-LAT discovery of gamma-rays from the blazar 1ES 1312-423
A deep observation campaign carried out by the High Energy Stereoscopic System (HESS) on Centaurus A enabled the discovery of gamma-rays from the blazar 1ES 1312-423, 2 degrees away from the radio galaxy. With a differential flux at 1 TeV of phi(1 TeV) = (1.9 +/- 0.6(stat) +/- 0.4(sys)) x 10(-13) cm(-2) s(-1) TeV-1 corresponding to 0.5 per cent of the Crab nebula differential flux and a spectral index Gamma = 2.9 +/- 0.5(stat) +/- 0.2(sys), 1ES 1312-423 is one of the faintest sources ever detected in the very high energy (E > 100 GeV) extragalactic sky. A careful analysis using three and a half years of Fermi Large Area Telescope (Fermi-LAT) data allows the discovery at high energies (E > 100 MeV) of a hard spectrum (Gamma = 1.4 +/- 0.4(stat) +/- 0.2(sys)) source coincident with 1ES 1312-423. Radio, optical, UV and X-ray observations complete the spectral energy distribution of this blazar, now covering 16 decades in energy. The emission is successfully fitted with a synchrotron self-Compton model for the non-thermal component, combined with a blackbody spectrum for the optical emission from the host galaxy.
Monthly notices of the Royal Astronomical Society
10.1093/mnras/stt1081
0035-8711
wos:2011-2013
WOS:000323639900006
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., yvonne.becherini@lsw.uni-heidelberg.de; biteau@in2p3.fr; david.sanchez@mpi-hd.mpg.de; jeremy.s.perkins@nasa.gov
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Particle Physics and
Astronomy Research Council (PPARC); IPNP of the Charles University;
South African Department of Science and Technology; National Research
Foundation; University of Namibia; Istituto Nazionale di Astrofisica in
Italy; Centre National d'Etudes Spatiales in France; Commonwealth of
Australia; NASA [NNH09ZDA001N]; NASA post-doctoral Programme at the
Goddard Space Flight Center
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
D. Goering
M-H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J-P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C-C. Lu
V. Marandon
A. Marcowith
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
D. Nedbal
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P-O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spiess
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J-P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H-S. Zechlin
J. S. Perkins
R. Ojha
J. Stevens
P. G. Edwards
M. Kadler
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
galaxies: active
eng
uncontrolled
BL Lacertae objects: individual: 1ES 1312-423
eng
uncontrolled
galaxies: jets
eng
uncontrolled
gamma-rays: galaxies
Institut für Physik und Astronomie
Referiert
35175
2013
2013
eng
8
551
article
EDP SCIENCES S A
LES ULIS CEDEX A
HESS Collaboration
1
--
--
--
Search for very-high-energy gamma-ray emission from Galactic globular
clusters with HESS
Context. Globular clusters (GCs) are established emitters of high-energy (HE, 100 MeV < E < 100 GeV) gamma-ray radiation which could originate from the cumulative emission of the numerous millisecond pulsars (msPSRs) in the clusters’ cores or from inverse Compton (IC) scattering of relativistic leptons accelerated in the GC environment. These stellar clusters could also constitute a new class of sources in the very-high-energy (VHE, E > 100 GeV) gamma-ray regime, judging from the recent detection of a signal from the direction of Terzan 5 with the H.E.S.S. telescope array. Aims. To search for VHE gamma-ray sources associated with other GCs, and to put constraints on leptonic emission models, we systematically analyzed the observations towards 15 GCs taken with the H. E. S. S. array of imaging atmospheric Cherenkov telescopes. Methods. We searched for point-like and extended VHE gamma-ray emission from each GC in our sample and also performed a stacking analysis combining the data from all GCs to investigate the hypothesis of a population of faint emitters. Assuming IC emission as the origin of the VHE gamma-ray signal from the direction of Terzan 5, we calculated the expected gamma-ray flux from each of the 15 GCs, based on their number of millisecond pulsars, their optical brightness and the energy density of background photon fields. Results. We did not detect significant VHE gamma-ray emission from any of the 15 GCs in either of the two analyses. Given the uncertainties related to the parameter determinations, the obtained flux upper limits allow to rule out the simple IC/msPSR scaling model for NGC6388 and NGC7078. The upper limits derived from the stacking analyses are factors between 2 and 50 below the flux predicted by the simple leptonic scaling model, depending on the assumed source extent and the dominant target photon fields. Therefore, Terzan 5 still remains exceptional among all GCs, as the VHE gamma-ray emission either arises from extra-ordinarily efficient leptonic processes, or from a recent catastrophic event, or is even unrelated to the GC itself.
ASTRONOMY & ASTROPHYSICS
10.1051/0004-6361/201220719
0004-6361
wos:2011-2013
A26
WOS:000316460600026
Eger, P (reprint author), Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
, eger@mpi-hd.mpg.de; Christopher.van.Eldik@physik.uni-erlangen.de
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; U.K.
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
Jonathan Biteau
A. Bochow
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
Ryan C. G. Chaves
A. Cheesebrough
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O&rsquo Drury
C.
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Kathrin Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
B. Glueck
D. Goering
M-H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
D. Hampf
J. Harris
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
R. Kossakowski
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J-P Lenain
D. Lennarz
T. Lohse
A. Lopatin
C-C. Lu
V. Marandon
A. Marcowith
J. Masbou
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
R. Moderski
M. Mohamed
E. Moulin
C. L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
N. Nguyen
J. Niemiec
S. J. Nolan
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P-O Petrucci
B. Peyaud
S. Pita
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J. L. Skilton
H. Sol
G. Spengler
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J-P Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
S. Vorobiov
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H-S Zechlin
eng
uncontrolled
globular clusters: general
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
pulsars: general
eng
uncontrolled
gamma rays: general
34578
2013
2013
eng
12
10
88
article
American Physical Society
College Park
HESS Collaboration
1
--
--
--
Constraints on axionlike particles with HESS from the irregularity of the PKS 2155-304 energy spectrum
Axionlike particles (ALPs) are hypothetical light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays and turbulent magnetic fields, the existence of ALPs can modify the energy spectrum of the gamma rays for a sufficiently large coupling between ALPs and photons. This modification would take the form of an irregular behavior of the energy spectrum in a limited energy range. Data from the H. E. S. S. observations of the distant BL Lac object PKS 2155 - 304 (z = 0.116) are used to derive upper limits at the 95% C. L. on the strength of the ALP coupling to photons, g(gamma a) < 2.1 x 10(-11) GeV-1 for an ALP mass between 15 and 60 neV. The results depend on assumptions on the magnetic field around the source, which are chosen conservatively. The derived constraints apply to both light pseudoscalar and scalar bosons that couple to the electromagnetic field.
Physical review : D, Particles, fields, gravitation, and cosmology
10.1103/PhysRevD.88.102003
1550-7998
1550-2368
wos:2011-2013
102003
WOS:000327214000001
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-27761 Hamburg, Germany., pierre.brun@cea.fr; denis.wouters@cea.fr
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Program of the CNRS; United
Kingdom Science and Technology Facilities Council (STFC); IPNP of the
Charles University; Czech Science Foundation; Polish Ministry of Science
and Higher Education; South African Department of Science and
Technology; National Research Foundation; University of Namibia;
European Community [ERC-StG-259391]
Attila Abramowski
F. Acero
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
D. Goering
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J-P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C-C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
D. Nedbal
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P-O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spiess
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J-P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H-S. Zechlin
Institut für Physik und Astronomie
Referiert
39385
2015
2015
eng
7
573
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
The high-energy gamma-ray emission of AP Librae
The gamma-ray spectrum of the low-frequency-peaked BL Lac (LBL) object AP Librae is studied, following the discovery of very-high-energy (VHE; E > 100 GeV) gamma-ray emission up to the TeV range by the H.E.S.S. experiment. Thismakes AP Librae one of the few VHE emitters of the LBL type. The measured spectrum yields a flux of (8.8 +/- 1.5(stat) +/- 1.8(sys)) x 10(-12) cm(-2) s(-1) above 130 GeV and a spectral index of Gamma = 2.65 +/- 0.19(stat) +/- 0.20(sys). This study also makes use of Fermi-LAT observations in the high energy (HE, E > 100 MeV) range, providing the longest continuous light curve (5 years) ever published on this source. The source underwent a flaring event between MJD 56 306-56 376 in the HE range, with a flux increase of a factor of 3.5 in the 14 day bin light curve and no significant variation in spectral shape with respect to the low-flux state. While the H.E.S.S. and (low state) Fermi-LAT fluxes are in good agreement where they overlap, a spectral curvature between the steep VHE spectrum and the Fermi-LAT spectrum is observed. The maximum of the gamma-ray emission in the spectral energy distribution is located below the GeV energy range.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201321436
0004-6361
1432-0746
wos:2015
A31
WOS:000346901300001
Biteau, J (reprint author), Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France., biteau@in2p3.fr; david.sanchez@lapp.in2p3.fr; pafortin@cfa.harvard.edu
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; Astroparticle Interdisciplinary Programme
of the CNRS [CNRS-IN2P3]; UK. Particle Physics and Astronomy Research
Council (PPARC); IPNP of the Charles University; South African
Department of Science and Technology; National Research Foundation;
University of Namibia; INAF in Italy; CNES in France; Fermi LAT
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
Uli Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
Tanja Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
I. Reichardt
A. Reimer
Olaf Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
Christopher van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Wrnlein
D. Wouters
R. Yang
V. Zabalza
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
J. Finke
P. Fortin
D. Horan
eng
uncontrolled
galaxies: active
eng
uncontrolled
BL Lacertae objects: individual: AP Librae
eng
uncontrolled
gamma rays: galaxies
Institut für Physik und Astronomie
Referiert
39195
2015
2015
eng
10
574
article
EDP Sciences
Les Ulis
HESS Collaboration, Fermi-LAT Collaboration
1
--
--
--
Probing the gamma-ray emission from HESS J1834-087 using HESS and Fermi LAT observations
Aims. Previous observations with the High Energy Stereoscopic System (H.E.S.S.) have revealed an extended very-high-energy (VHE; E > 100 GeV) gamma-ray source, HESS J1834-087, coincident with the supernova remnant (SNR) W41. The origin of the gamma-ray emission was investigated in more detail with the H.E.S.S. array and the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope.
Methods. The gamma-ray data provided by 61 h of observations with H.E.S.S., and four years with the Fermi LAT were analyzed, covering over five decades in energy from 1.8 GeV up to 30 TeV. The morphology and spectrum of the TeV and GeV sources were studied and multiwavelength data were used to investigate the origin of the gamma-ray emission toward W41.
Results. The TeV source can be modeled with a sum of two components: one point-like and one significantly extended (sigma(TeV) = 0.17 degrees +/- 0.01 degrees), both centered on SNR W41 and exhibiting spectra described by a power law with index Gamma(TeV) similar or equal to 2.6. The GeV source detected with Fermi LAT is extended (sigma(GeV) = 0.15 degrees +/- 0.03 degrees) and morphologically matches the VHE emission. Its spectrum can be described by a power-law model with an index Gamma(GeV) = 2.15 +/- 0.12 and smoothly joins the spectrum of the whole TeV source. A break appears in the gamma-ray spectra around 100 GeV. No pulsations were found in the GeV range.
Conclusions. Two main scenarios are proposed to explain the observed emission: a pulsar wind nebula (PWN) or the interaction of SNR W41 with an associated molecular cloud. X-ray observations suggest the presence of a point-like source (a pulsar candidate) near the center of the remnant and nonthermal X-ray diffuse emission that could arise from the possibly associated PWN. The PWN scenario is supported by the compatible positions of the TeV and GeV sources with the putative pulsar. However, the spectral energy distribution from radio to gamma-rays is reproduced by a one-zone leptonic model only if an excess of low-energy electrons is injected following a Maxwellian distribution by a pulsar with a high spin-down power (> 10(37) erg s(-1)). This additional low-energy component is not needed if we consider that the point-like TeV source is unrelated to the extended GeV and TeV sources. The interacting SNR scenario is supported by the spatial coincidence between the gamma-ray sources, the detection of OH (1720 MHz) maser lines, and the hadronic modeling.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201322694
0004-6361
1432-0746
wos:2015
A27
WOS:000349467000027
Mehault, J (reprint author), Univ Bordeaux 1, CNRS, IN2P3, CEN Bordeaux Gradignan, F-33175 Gradignan, France., grondin@cenbg.in2p3.fr; mehault@cenbg.in2p3.fr
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Science and Technology
Facilities Council (STFC); IPNP of the Charles University; Polish
Ministry of Science and Higher Education; South African Department of
Science and Technology; National Research Foundation; University of
Namibia; Istituto Nazionale di Astrofisica in Italy; Centre National
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Füßling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
Markus Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
F. Acero
J. M. Casandjian
J. Cohen-Tanugi
F. Giordano
L. Guillemot
J. Lande
H. Pletsch
Y. Uchiyama
eng
uncontrolled
acceleration of particles
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
ISM: clouds
eng
uncontrolled
cosmic rays
Institut für Physik und Astronomie
Referiert
39113
2015
2015
eng
6
575
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
HESS reveals a lack of TeV emission from the supernova remnant Puppis A (Research Note)
Context. Puppis A is an interesting similar to 4 kyr-old supernova remnant (SNR) that shows strong evidence of interaction between the forward shock and a molecular cloud. It has been studied in detail from radio frequencies to high-energy (HE, 0.1-100 GeV) gamma-rays. An analysis of the Fermi-LAT data has shown extended HE gamma-ray emission with a 0.2-100 GeV spectrum exhibiting no significant deviation from a power law, unlike most of the GeV-emitting SNRs known to be interacting with molecular clouds. This makes it a promising target for imaging atmospheric Cherenkov telescopes (IACTs) to probe the gamma-ray emission above 100 GeV.
Aims. Very-high-energy (VHE, E >= 0.1 TeV) gamma-ray emission from Puppis A has been, for the first time, searched for with the High Energy Stereoscopic System (HESS.).
Methods. Stereoscopic imaging of Cherenkov radiation from extensive air showers is used to reconstruct the direction and energy of the incident gamma-rays in order to produce sky images and source spectra. The profile likelihood method is applied to find constraints on the existence of a potential break or cutoff in the photon spectrum.
Results. The analysis of the HESS. data does not reveal any significant emission towards Puppis A. The derived upper limits on the differential photon flux imply that its broadband gamma-ray spectrum must exhibit a spectral break or cutoff. By combining Fermi-LAT and HESS. measurements, the 99% confidence-level upper limits on such a cutoff are found to be 450 and 280 GeV, assuming a power law with a simple exponential and a sub-exponential cutoff, respectively. It is concluded that none of the standard limitations (age, size, radiative losses) on the particle acceleration mechanism, assumed to be continuing at present, can explain the lack of VHE signal. The scenario in which particle acceleration has ceased some time ago is considered as an alternative explanation. The HE/VHE spectrum of Puppis A could then exhibit a break of non-radiative origin (as observed in several other interacting SNRs, albeit at somewhat higher energies), owing to the interaction with dense and neutral material, in particular towards the NE region.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/2014424805
0004-6361
1432-0746
wos:2015
A81
WOS:000350249100081
Fernandez, D (reprint author), Univ Montpellier 2, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France., diane.fernandez@lupmuniv-montp2.fr; igor.oya.vallejo@desy..de
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Füssling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Maraike Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
Michael Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
gamma rays: ISM
eng
uncontrolled
ISM: individual objects: Puppis A
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
cosmic rays
eng
uncontrolled
acceleration of particles
Institut für Physik und Astronomie
Referiert
39196
2015
2015
eng
7
574
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
HESS detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud
G349.7+0.2 is a young Galactic supernova remnant (SNR) located at the distance of 11.5 kpc and observed across the entire electromagnetic spectrum from radio to high energy (HE; 0.1 GeV < E < 100 GeV) gamma-rays. Radio and infrared observations indicate that the remnant is interacting with a molecular cloud. In this paper, the detection of very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with this SNR with the High Energy Stereoscopic System (HESS.) is reported. This makes it one of the farthest Galactic SNR ever detected in this domain. An integral flux F(E > 400 GeV) = (6.5 +/- 1.1(stat) +/- 1.3(syst)) x 10-11 ph cm(-2) s(-1) corresponding to similar to 0.7% of that of the Crab Nebula and to a luminosity of similar to 10(34) erg s(-1) above the same energy threshold, and a steep photon index Gamma(VHE) = 2.8 +/- 0.27(stat) +/- 0.20(syst) are measured. The analysis of more than 5 yr of Fermi-LAT data towards this source shows a power-law like spectrum with a best-fit photon index Gamma(HE) = 2.2 +/- 0.04.2(stat-0.31sys)(+0.13), The combined gamma-ray spectrum of 0349.7+0.2 can be described by either a broken power law (I3PL) or a power law with exponential (or sub exponential) cutoff (PLC). In the former case, the photon break energy is found at E-br,E-gamma = 551(-30)(+70) GeV, slightly higher than what is usually observed in the HE/VHE gamma-ray emitting middle-aged SNRs known to be interacting with molecular clouds. In the latter case. the exponential (respectively sub-exponential) cutoff energy is measured at E-cat,E-gamma = 1.4(-0.55)(+1.6) (respectively 0.35(-0.21)(+0.75)) TeV. A pion decay process resulting from the interaction of the accelerated protons and nuclei with the dense surrounding medium is clearly the preferred scenario to explain the gamma-ray emission. The BPL with a spectral steepening of 0.5-1 and the PLC provide equally good fits to the data. The product or the average gas density and the total energy content of accelerated protons and nuclei amounts to nu W-p similar to 5 x 10(51) erg cm(-3)
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201425070
0004-6361
1432-0746
wos:2015
A100
WOS:000349467000100
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; U.K.
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chatraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
O. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. P. Lenain
T. Lohse
A. Lopatin
C-C Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
Markus Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Anibas
N. W. Pekeur
G. Pelletier
P-O Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H-S Zechlin
eng
uncontrolled
gamma rays: general
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
ISM: clouds
Institut für Physik und Astronomie
Referiert
39080
2015
2015
eng
14
1
802
article
IOP Publ. Ltd.
Bristol
HESS Collaboration
1
--
--
--
The 2012 flare of PG 1553+113 seen with hess and Fermi-lat
Very high energy (VHE, E > 100 GeV)gamma-ray flaring activity of the high-frequency peaked BL Lac object PG 1553 + 113 has been detected by the H.E.S.S. telescopes. The flux of the source increased by a factor of 3 during the nights of 2012 April 26 and 27 with respect to the archival measurements with a hint of intra-night variability. No counterpart of this event has been detected in the Fermi-Large Area Telescope data. This pattern is consistent with VHE gamma(-)ray flaring being caused by the injection of ultrarelativistic particles, emitting.-rays at the highest energies. The dataset offers a unique opportunity to constrain the redshift of this source at z = 0.49 +/- 0.04 using a novel method based on Bayesian statistics. The indication of intra-night variability is used to introduce a novel method to probe for a possible Lorentz invariance violation (LIV), and to set limits on the energy scale at which Quantum Gravity (QG) effects causing LIV may arise. For the subluminal case, the derived limits are E-QG,E- 1 > 4.10 x 10(17) GeV and E-QG,E- 2 > 2.10 x 10(10) GeV for linear and quadratic LIV effects, respectively.
The astrophysical journal : an international review of spectroscopy and astronomical physics
10.1088/0004-637X/802/1/65
0004-637X
1538-4357
wos:2015
65
WOS:000351834700065
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Particle Physics and
Astronomy Research Council (PPARC); IPNP of the Charles University;
South African Department of Science and Technology; National Research
Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiaon
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
M. Grudzinska
D. Hadsch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
Krzysztof Katarzynski
Uli Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nukri Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C-C Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
Manuela Meyer
A. M. W. Mitchell
R. Moderski
Mmahmoud Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
Olaf Reimer
M. Renaud
R. de Los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
Christopher van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
BL Lacertae objects: individual (PG 1553+113)
eng
uncontrolled
galaxies: active
eng
uncontrolled
galaxies: distances and redshifts
eng
uncontrolled
gamma-rays: galaxies
Institut für Physik und Astronomie
Referiert
39148
2015
2015
eng
6
8
114
article
American Physical Society
College Park
HESS Collaboration
1
--
--
--
Constraints on an Annihilation Signal from a Core of Constant Dark Matter Density around the Milky Way Center with HESS
An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated on-off observations of the Galactic center region with H.E.S.S. are analyzed for this purpose. No significant signal is found in a total of similar to 9 h of on-off observations. Upper limits on the velocity averaged cross section, <sigma upsilon >, for the annihilation of dark matter particles with masses in the range of similar to 300 GeV to similar to 10 TeV are derived. In contrast to previous constraints derived from observations of the Galactic center region, the constraints that are derived here apply also under the assumption of a central core of constant dark matter density around the center of the Galaxy. Values of <sigma upsilon > that are larger than 3 x 10(-24) cm(3)/s are excluded for dark matter particles with masses between similar to 1 and similar to 4 TeV at 95% C.L. if the radius of the central dark matter density core does not exceed 500 pc. This is the strongest constraint that is derived on <sigma upsilon > for annihilating TeV mass dark matter without the assumption of a centrally cusped dark matter density distribution in the search region.
Physical review letters
10.1103/PhysRevLett.114.081301
25768750
0031-9007
1079-7114
wos:2015
081301
WOS:000350107800003
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
German Ministry of Education and Research (BMBF); Max Planck Society;
French Ministry of Research; CNRS-IN2P3; Astroparticle Interdisciplinary
Programme of the CNRS; United Kingdom Particle Physics and Astronomy
Research Council (PPARC); IPNP of the Charles University; South African
Department of Science and Technology; National Research Foundation;
University of Namibia; European Community [ERC-StG-259391]
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Margitte Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
Michael Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
Institut für Physik und Astronomie
Referiert
39240
2015
2015
eng
406
412
7
6220
347
article
American Assoc. for the Advancement of Science
Washington
HESS Collaboration
1
--
--
--
The exceptionally powerful TeV gamma-ray emitters in the Large Magellanic Cloud
The Large Magellanic Cloud, a satellite galaxy of the Milky Way, has been observed with the High Energy Stereoscopic System (H.E.S.S.) above an energy of 100 billion electron volts for a deep exposure of 210 hours. Three sources of different types were detected: the pulsar wind nebula of the most energetic pulsar known, N 157B; the radio-loud supernova remnant N 132D; and the largest nonthermal x-ray shell, the superbubble 30 Dor C. The unique object SN 1987A is, unexpectedly, not detected, which constrains the theoretical framework of particle acceleration in very young supernova remnants. These detections reveal the most energetic tip of a g-ray source population in an external galaxy and provide via 30 Dor C the unambiguous detection of g-ray emission from a superbubble.
Science
10.1126/science.1261313
0036-8075
1095-9203
wos:2015
WOS:000348225800039
Abramowski, A (reprint author), Univ Hamburg Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; U.K.
Science and Technology Facilities Council (STFC); Institute of Particle
and Nuclear Physics (IPNP) of Charles University; Czech Science
Foundation; Polish Ministry of Science and Higher Education; South
African Department of Science and Technology; South African National
Research Foundation; University of Namibia; European Community
[ERC-StG-259391]
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker-Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
I. D. Davids
B. Degrange
C. Deil
P. de Wilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M-H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J-P. Lenain
T. Lohse
A. Lopatin
C-C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P-O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J-P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H-S. Zechlin
Institut für Physik und Astronomie
Referiert
52900
2018
2018
eng
7
20
120
article
American Physical Society
College Park
HESS Collaboration
1
2018-05-15
2018-05-15
--
Search for gamma-Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with HESS
Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy gamma rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. We report on a search for a monoenergetic spectral line from self-annihilations of DM particles in the energy range from 300 GeV to 70 TeV using a two-dimensional maximum likelihood method taking advantage of both the spectral and spatial features of the signal versus background. The analysis makes use of Galactic center observations accumulated over ten years (2004-2014) with the H.E.S.S. array of ground-based Cherenkov telescopes. No significant gamma-ray excess above the background is found. We derive upper limits on the annihilation cross section (sigma v) for monoenergetic DM lines at the level of 4 x 10(-28) cm(3) s(-1) at 1 TeV, assuming an Einasto DM profile for the Milky Way halo. For a DM mass of 1 TeV, they improve over the previous ones by a factor of 6. The present constraints are the strongest obtained so far for DM particles in the mass range 300 GeV-70 TeV. Ground-based gamma-ray observations have reached sufficient sensitivity to explore relevant velocity-averaged cross sections for DM annihilation into two gamma-ray photons at the level expected from the thermal relic density for TeV DM particles.
Physical review letters
10.1103/PhysRevLett.120.201101
29864326
0031-9007
1079-7114
wos:2018
201101
WOS:000433030700003
Abdallah, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
University of Namibia; German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck Society; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; United Kingdom Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC)Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology and National Research Foundation; National Commission on Research; Science and Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science; Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; H.E.S.S. Virtual Organisation; national resource providers of the EGI Federation; EU FP7 Marie CurieEuropean Union (EU) [PIEF-GA-2012-332350]
2021-12-01T08:35:12+00:00
sword
importub
filename=package.tar
1de00d277eccba3a9b4d2f3a65e434ad
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
S. Caroff
A. Carosi
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
S. Colafrancesco
B. Condon
J. Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. Dewilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
G. Emery
J-P Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
B. Giebels
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J-P Lees
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
R. Liu
T. Lohse
M. Lorentz
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
H. Poon
D. Prokhorov
H. Prokoph
G. Puelhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. De Los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
M. Schandri
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
I Sushch
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
53095
2018
2018
eng
6
612
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2018-04-22
2018-04-22
--
Systematic search for very-high-energy gamma-ray emission from bow shocks of runaway stars
Context. Runaway stars form bow shocks by ploughing through the interstellar medium at supersonic speeds and are promising sources of non-thermal emission of photons. One of these objects has been found to emit non-thermal radiation in the radio band. This triggered the development of theoretical models predicting non-thermal photons from radio up to very-high-energy (VHE, E >= 0.1 TeV) gamma rays. Subsequently, one bow shock was also detected in X-ray observations. However, the data did not allow discrimination between a hot thermal and a non-thermal origin. Further observations of different candidates at X-ray energies showed no evidence for emission at the position of the bow shocks either. A systematic search in the Fermi-LAT energy regime resulted in flux upper limits for 27 candidates listed in the E-BOSS catalogue. Aims. Here we perform the first systematic search for VHE gamma-ray emission from bow shocks of runaway stars. Methods. Using all available archival H.E.S.S. data we search for very-high-energy gamma-ray emission at the positions of bow shock candidates listed in the second E-BOSS catalogue release. Out of the 73 bow shock candidates in this catalogue, 32 have been observed with H.E.S.S. Results. None of the observed 32 bow shock candidates in this population study show significant emission in the H.E.S.S. energy range. Therefore, flux upper limits are calculated in five energy bins and the fraction of the kinetic wind power that is converted into VHE gamma rays is constrained. Conclusions. Emission from stellar bow shocks is not detected in the energy range between 0.14 and 18 TeV. The resulting upper limits constrain the level of VHE gamma-ray emission from these objects down to 0.1-1% of the kinetic wind energy.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201630151
1432-0746
wos:2018
A12
WOS:000429404700012
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; EGI Federation; National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA)
2021-12-13T11:06:53+00:00
sword
importub
filename=package.tar
7859a96d06003ce8dd490051fb7393a6
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
M. Coffaro
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
S. Richter
F. Rieger
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Michael Stegmann
K. Stycz
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
gamma rays: ISM
eng
uncontrolled
stars: early-type
eng
uncontrolled
gamma rays: stars
Physik
Institut für Physik und Astronomie
Import
38157
2014
2014
eng
14
2
780
article
IOP Publ. Ltd.
Bristol
VERITAS Collaboration, HESS Collaboration
1
--
--
--
Long-term TeV and X-RAY observations of the GAMMA- RAY binary hess J0632+057
The astrophysical journal : an international review of spectroscopy and astronomical physics
10.1088/0004-637X/780/2/168
0004-637X
1538-4357
wos:2014
168
WOS:000329097100055
Aliu, E (reprint author), Columbia Univ Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA., afalcone@astro.psu.edu; gernot.maier@desy.de; pol.bordas@uni-tuebingen.de
U.S. Department of Energy Office of Science; U.S. National Science
Foundation; Smithsonian Institution; NSERC in Canada; Science Foundation
Ireland [SFI 10/RFP/AST2748]; STFC in the U.K; Helmholtz Association;
European Community [ERC-StG-259391]; German Ministry for Education and
Research (BMBF); Max Planck Society; French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; U.K.
Particle Physics and Astronomy Research Council (PPARC); IPNP of the
Charles University; South African Department of Science and Technology
and National Research Foundation; University of Namibia
E. Aliu
S. Archambault
T. Aune
B. Behera
M. Beilicke
W. Benbow
K. Berger
R. Bird
A. Bouvier
J. H. Buckley
V. Bugaev
K. Byrum
M. Cerruti
X. Chen
L. Ciupik
M. P. Connolly
W. Cui
C. Duke
J. Dumm
M. Errando
A. Falcone
S. Federici
Q. Feng
J. P. Finley
P. Fortin
L. Fortson
A. Furniss
N. Galante
G. H. Gillanders
S. Griffin
S. T. Griffiths
J. Grube
G. Gyuk
D. Hanna
J. Holder
G. Hughes
T. B. Humensky
P. Kaaret
M. Kertzman
Y. Khassen
D. Kieda
H. Krawczynski
F. Krennrich
M. J. Lang
A. S. Madhavan
G. Maier
P. Majumdar
A. McCann
P. Moriarty
R. Mukherjee
D. Nieto
R. A. Ong
A. N. Otte
N. Park
J. S. Perkins
M. Pohl
A. Popkow
H. Prokoph
J. Quinn
K. Ragan
J. Rajotte
L. C. Reyes
P. T. Reynolds
G. T. Richards
E. Roache
J. Rousselle
G. H. Sembroski
F. Sheidaei
C. Skole
A. W. Smith
D. Staszak
M. Stroh
Igor O. Telezhinsky
M. Theiling
J. V. Tucci
J. Tyler
A. Varlotta
S. Vincent
S. P. Wakely
A. Weinstein
R. Welsing
D. A. Williams
A. Zajczyk
B. Zitzer
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
acceleration of particles
eng
uncontrolled
binaries: general
eng
uncontrolled
gamma rays: general(HESS J0632+057, VER J0633+057)
Institut für Physik und Astronomie
Referiert
37483
2014
2014
eng
6
1
794
article
IOP Publ. Ltd.
Bristol
HESS Collaboration
1
--
--
--
Discovery of the hard spectrum VHE gamma-ray source Hess J1641-463
This Letter reports the discovery of a remarkably hard spectrum source, HESS J1641-463, by the High Energy Stereoscopic System (H.E.S.S.) in the very high energy (VHE) domain. HESS J1641-463 remained unnoticed by the usual analysis techniques due to confusion with the bright nearby source HESS J1640-465. It emerged at a significance level of 8.5 standard deviations after restricting the analysis to events with energies above 4 TeV. It shows a moderate flux level of phi(E > 1TeV) = (3.64 +/- 0.44(stat)+/- 0.73(sys)) x 10(-13) cm(-2) s(-1), corresponding to 1.8% of the Crab Nebula flux above the same energy, and a hard spectrum with a photon index of Gamma = 2.07 +/- 0.11(stat)+/- 0.20(sys). It is a point-like source, although an extension up to a Gaussian width of sigma = 3 arcmin cannot be discounted due to uncertainties in the H.E.S.S. point-spread function. The VHE gamma-ray flux of HESS J1641-463 is found to be constant over the observed period when checking time binnings from the year-by-year to the 28 minute exposure timescales. HESS J1641-463 is positionally coincident with the radio supernova remnant SNR G338.5+0.1. No X-ray candidate stands out as a clear association; however, Chandra and XMM-Newton data reveal some potential weak counterparts. Various VHE gamma-ray production scenarios are discussed. If the emission from HESS J1641-463 is produced by cosmic ray protons colliding with the ambient gas, then their spectrum must extend close to 1 PeV. This object may represent a source population contributing significantly to the galactic cosmic ray flux around the knee.
The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters
10.1088/2041-8205/794/1/L1
2041-8205
2041-8213
wos:2014
L1
WOS:000343304300001
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., sabrina.casanova@ifj.edu.pl; igor.oya.vallejo@desy.de
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; U.K. Science and Technology
Facilities Council (STFC); IPNP of the Charles University; Polish
Ministry of Science and Higher Education; South African Department of
Science and Technology and National Research Foundation; University of
Namibia; European Community [ERC-StG-259391]
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
E. O. Ang Uner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de Los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. Van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
Y. Fukui
H. Sano
T. Fukuda
S. Yoshiike
eng
uncontrolled
cosmic rays
eng
uncontrolled
gamma rays: general
eng
uncontrolled
ISM: individual objects (SNR G338.3-0.0, SNR G338.5+0.1)
Institut für Physik und Astronomie
Referiert
37285
2014
2014
eng
15
11
90
article
American Physical Society
College Park
HESS Collaboration
1
--
--
--
Search for dark matter annihilation signatures in HESS observations of
dwarf spheroidal galaxies
Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of nonthermal high-energy gamma-ray emission or intense star formation. Therefore they are among the most promising candidates for indirect dark matter searches. During the last years the High Energy Stereoscopic System (H.E.S.S.) of imaging atmospheric Cherenkov telescopes observed five of these dwarf galaxies for more than 140 hours in total, searching for TeV gamma-ray emission from annihilation of dark matter particles. The new results of the deep exposure of the Sagittarius dwarf spheroidal galaxy, the first observations of the Coma Berenices and Fornax dwarves and the reanalysis of two more dwarf spheroidal galaxies already published by the H.E.S.S. Collaboration, Carina and Sculptor, are presented. In the absence of a significant signal new constraints on the annihilation cross section applicable to weakly interacting massive particles (WIMPs) are derived by combining the observations of the five dwarf galaxies. The combined exclusion limit depends on the WIMP mass and the best constraint is reached at 1-2 TeV masses with a cross-section upper bound of similar to 3.9 x 10(-24) cm(3) s(-1) at a 95% confidence level.
Physical review : D, Particles, fields, gravitation, and cosmology
10.1103/PhysRevD.90.112012
1550-7998
1550-2368
wos:2014
112012
WOS:000347202900002
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., emrah@physik.hu-berlin.de; Christian.Farnier@fysik.su.se; Giovanni.Lamanna@lapp.in2p3.fr
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; U.K. Science and Technology
Facilities Council (STFC); IPNP of Charles University; Czech Science
Foundation; Polish Ministry of Science and Higher Education; South
African Department of Science and Technology; National Research
ENIGMASS; Knut and Alice Wallenberg foundation; European Community
[ERC-StG-259391]
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goudelis
M. -H. Grondin
M. Grudzinska
D. Hadsch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
Olaf Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
Fabian Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
P. Serpico
H. Sol
F. Spanier
G. Spengler
F. Spiess
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
Institut für Physik und Astronomie
Referiert
37284
2014
2014
eng
8
12
90
article
American Physical Society
College Park
HESS Collaboration
1
--
--
--
Diffuse Galactic gamma-ray emission with HESS
Diffuse gamma-ray emission is the most prominent observable signature of celestial cosmic-ray interactions at high energies. While already being investigated at GeVenergies over several decades, assessments of diffuse gamma-ray emission at TeVenergies remain sparse. After completion of the systematic survey of the inner Galaxy, the H.E.S.S. experiment is in a prime position to observe large-scale diffuse emission at TeVenergies. Data of the H.E.S.S. Galactic Plane Survey are investigated in regions off known gamma-ray sources. Corresponding gamma-ray flux measurements were made over an extensive grid of celestial locations. Longitudinal and latitudinal profiles of the observed gamma-ray fluxes show characteristic excess emission not attributable to known gamma-ray sources. For the first time large-scale gamma-ray emission along the Galactic plane using imaging atmospheric Cherenkov telescopes has been observed. While the background subtraction technique limits the ability to recover modest variation on the scale of the H.E.S.S. field of view or larger, which is characteristic of the inverse Compton scatter-induced Galactic diffuse emission, contributions of neutral pion decay as well as emission from unresolved gamma-ray sources can be recovered in the observed signal to a large fraction. Calculations show that the minimum gamma-ray emission from pi(0) decay represents a significant contribution to the total signal. This detection is interpreted as a mix of diffuse Galactic gamma-ray emission and unresolved sources.
Physical review : D, Particles, fields, gravitation, and cosmology
10.1103/PhysRevD.90.122007
1550-7998
1550-2368
wos:2014
122007
WOS:000347194400004
Egberts, K (reprint author), Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Golm, Germany., Kathrin.Egberts@uni-potsdam.de; Olaf.Reimer@uibk.ac.at
Namibian authorities; German Ministry for Education and Research (BMBF);
Max Planck Society; German Research Foundation (DFG); French Ministry
for Research; CNRS-IN2P3; Astroparticle Interdisciplinary Programme of
the CNRS; U.K. Science and Technology Facilities Council (STFC); IPNP of
the Charles University; Czech Science Foundation; Polish Ministry of
Science and Higher Education; South African Department of Science and
Technology; National Research Foundation; University of Namibia;
European Community [ERC-StG-259391]; Knut and Alice Wallenberg
Foundation
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. dewilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
Marek Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieck
Krzysztof Katarzynski
Uli Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
Michael Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
Olaf Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
R. Schlickeiser
Fabian Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
Christopher van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
Y. Fukui
Institut für Physik und Astronomie
Referiert
34961
2013
2013
eng
7
6
554
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
HESS discovery of VHE gamma-rays from the quasar PKS 1510-089
The quasar PKS 1510-089 (z = 0.361) was observed with the H.E.S.S. array of imaging atmospheric Cherenkov telescopes during high states in the optical and GeV bands, to search for very high energy (VHE, defined as E >= 0.1 TeV) emission. VHE gamma-rays were detected with a statistical significance of 9.2 standard deviations in 15.8 h of H. E. S. S. data taken during March and April 2009. A VHE integral flux of I(0.15 TeV < E < 1.0TeV) = (1.0 +/- 0.2(stat) +/- 0.2(sys)) x 10(-11) cm(-2) s(-1) is measured. The best-fit power law to the VHE data has a photon index of G = 5.4 +/- 0.7(stat) +/- 0.3(sys). The GeV and optical light curves show pronounced variability during the period of H.E.S.S. observations. However, there is insufficient evidence to claim statistically significant variability in the VHE data. Because of its relatively high redshift, the VHE flux from PKS 1510-089 should suffer considerable attenuation in the intergalactic space due to the extragalactic background light (EBL). Hence, the measured gamma-ray spectrum is used to derive upper limits on the opacity due to EBL, which are found to be comparable with the previously derived limits from relatively-nearby BL Lac objects. Unlike typical VHE-detected blazars where the broadband spectrum is dominated by nonthermal radiation at all wavelengths, the quasar PKS 1510-089 has a bright thermal component in the optical to UV frequency band. Among all VHE detected blazars, PKS 1510-089 has the most luminous broad line region. The detection of VHE emission from this quasar indicates a low level of gamma - gamma absorption on the internal optical to UV photon field.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201321135
0004-6361
wos:2011-2013
A107
WOS:000320444200106
Behera, B (reprint author), DESY, Platanenallee 6, D-15738 Zeuthen, Germany., Bagmeet.Behera@desy.de
Namibian authorities; University of Namibia; German Ministry for
Education and Research (BMBF); Max Planck Society; German Research
Foundation (DFG); French Ministry for Research; CNRS [IN2P3];
Astroparticle Interdisciplinary Programme of the CNRS; UK Science and
Technology Facilities Council (STFC); IPNP of the Charles University;
Czech Science Foundation; Polish Ministry of Science and Higher
Education; South African Department of Science and Technology; National
Research Foundation; International Max Planck Research School (IMPRS)
for Astronomy & Cosmic Physics at the University of Heidelberg
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
B. Behera
K. Bernlöhr
E. Birsin
Jonathan Biteau
A. Bochow
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
Ryan C. G. Chaves
A. Cheesebrough
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Kathrin Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foester
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
B. Glueck
D. Goeing
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
D. Hampf
J. Harris
M. Hauser
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
Nu. Komin
K. Kosack
R. Kossakowski
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
J. Masbou
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
R. Moderski
M. Mohamed
E. Moulin
C. L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
N. Nguyen
J. Niemiec
S. J. Nolan
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J. L. Skilton
H. Sol
G. Spengler
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
S. Vorobiov
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. S. Zechlin
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
quasars: individual: PKS 1510-089
eng
uncontrolled
infrared: diffuse background
Institut für Physik und Astronomie
Referiert
35257
2013
2013
eng
6
4
110
article
American Physical Society
College Park
HESS Collaboration
1
--
--
--
Search for Photon-Linelike Signatures from Dark Matter Annihilations with H.E.S.S.
Gamma-ray line signatures can be expected in the very-high-energy (E-gamma > 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable from astrophysical gamma-ray sources that in most cases produce continuous spectra that span over several orders of magnitude in energy. Using data collected with the H. E. S. S. gamma-ray instrument, upper limits on linelike emission are obtained in the energy range between similar to 500 GeV and similar to 25 TeV for the central part of the Milky Way halo and for extragalactic observations, complementing recent limits obtained with the Fermi-LAT instrument at lower energies. No statistically significant signal could be found. For monochromatic gamma-ray line emission, flux limits of (2 x 10(-7)-2 x 10(-5)) m(-2)s(-1)sr(-1) and (1 x 10(-8)- 2 x 10(-6)) m(-2)s(-1)sr(-1) are obtained for the central part of the Milky Way halo and extragalactic observations, respectively. For a DM particle mass of 1 TeV, limits on the velocity- averaged DM annihilation cross section <sigma upsilon >(chi chi ->gamma gamma) reach similar to 10(-27)cm(3)s(-1), based on the Einasto parametrization of the Galactic DM halo density profile. DOI: 10.1103/PhysRevLett.110.041301
Physical review letters
10.1103/PhysRevLett.110.041301
0031-9007
wos:2011-2013
041301
WOS:000313951300004
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., Daniil.Nekrassov@mpi-hd.mpg.de; Christopher.van.Eldik@physik.uni-erlangen.de
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; U.K. Science and Technology
Facilities Council (STFC); IPNP of the Charles University; Polish
Ministry of Science and Higher Education; South African Department of
Science and Technology; National Research Foundation; University of
Namibia; European Community [ERC-StG-259391]
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
Jonathan Biteau
A. Bochow
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
Ryan C. G. Chaves
A. Cheesebrough
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Kathrin Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Fussling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
B. Glueck
D. Goering
M. -H. Grondin
S. Haeffner
J. D. Hague
J. Hahn
D. Hampf
J. Harris
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
Nu Komin
K. Kosack
R. Kossakowski
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
J. Masbou
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
R. Moderski
M. Mohamed
E. Moulin
C. L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
D. Nekrassov
N. Nguyen
J. Niemiec
S. J. Nolan
S. Ohm
E. de Ona Awilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
G. Puehlhofer
M. Punch
A. Quirrenbach
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J. L. Skilton
H. Sol
G. Spengler
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
S. Vorobiov
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
Institut für Physik und Astronomie
Referiert
38071
2014
2014
eng
10
562
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
HESS J1818-154, a new composite supernova remnant discovered in TeV gamma rays and X-rays
Composite supernova remnants (SNRs) constitute a small subclass of the remnants of massive stellar explosions where non-thermal radiation is observed from both the expanding shell-like shock front and from a pulsar wind nebula (PWN) located inside of the SNR. These systems represent a unique evolutionary phase of SNRs where observations in the radio, X-ray, and gamma-ray regimes allow the study of the co-evolution of both these energetic phenomena. In this article, we report results from observations of the shell-type SNR G15.4+0.1 performed with the High Energy Stereoscopic System (H. E. S. S.) and XMM-Newton. A compact TeV gamma-ray source, HESS J1818-154, located in the center and contained within the shell of G15.4+0.1 is detected by H. E. S. S. and featurs a spectrum best represented by a power-law model with a spectral index of -2.3 +/- 0.3(stat) +/- 0.2(sys) and an integral flux of F(>0.42 TeV) = (0.9 +/- 0.3(stat) +/- 0.2(sys)) x 10(-12) cm(-2) s(-1). Furthermore, a recent observation with XMM-Newton reveals extended X-ray emission strongly peaked in the center of G15.4+0.1. The X-ray source shows indications of an energy-dependent morphology featuring a compact core at energies above 4 keV and more extended emission that fills the entire region within the SNR at lower energies. Together, the X-ray and VHE gamma-ray emission provide strong evidence of a PWN located inside the shell of G15.4+0.1 and this SNR can therefore be classified as a composite based on these observations. The radio, X-ray, and gamma-ray emission from the PWN is compatible with a one-zone leptonic model that requires a low average magnetic field inside the emission region. An unambiguous counterpart to the putative pulsar, which is thought to power the PWN, has been detected neither in radio nor in X-ray observations of G15.4+0.1.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201322914
0004-6361
1432-0746
wos:2014
562
WOS:000332161800133
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., eter.eger@mpi-hd.mpg.de; petter.hofverberg@mpi-hd.mpg.de
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. dewilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
X-rays: individuals: G15.4+0.1
eng
uncontrolled
gamma rays: general
eng
uncontrolled
methods: observational
eng
uncontrolled
supernovae: individual: HESS J1818-154
eng
uncontrolled
X-rays: general
Institut für Physik und Astronomie
Referiert
37826
2014
2014
eng
790
799
10
1
441
article
Oxford Univ. Press
Oxford
HESS Collaboration
1
--
--
--
TeV gamma-ray observations of the young synchrotron-dominated SNRs G1.9+0.3 and G330.2+1.0 with HESS
The non-thermal nature of the X-ray emission from the shell-type supernova remnants (SNRs) G1.9+0.3 and G330.2+1.0 is an indication of intense particle acceleration in the shock fronts of both objects. This suggests that the SNRs are prime candidates for very-high-energy (VHE; E > 0.1 TeV) gamma-ray observations. G1.9+0.3, recently established as the youngest known SNR in the Galaxy, also offers a unique opportunity to study the earliest stages of SNR evolution in the VHE domain. The purpose of this work is to probe the level of VHE gamma-ray emission from both SNRs and use this to constrain their physical properties. Observations were conducted with the H. E. S. S. (High Energy Stereoscopic System) Cherenkov Telescope Array over a more than six-year period spanning 2004-2010. The obtained data have effective livetimes of 67 h for G1.9+0.3 and 16 h for G330.2+1.0. The data are analysed in the context of the multiwavelength observations currently available and in the framework of both leptonic and hadronic particle acceleration scenarios. No significant gamma-ray signal from G1.9+0.3 or G330.2+1.0 was detected. Upper limits (99 per cent confidence level) to the TeV flux from G1.9+0.3 and G330.2+1.0 for the assumed spectral index Gamma = 2.5 were set at 5.6 x 10(-1)3 cm(-2) s(-1) above 0.26 TeV and 3.2 x 10(-12) cm(-2) s(-1) above 0.38 TeV, respectively. In a one-zone leptonic scenario, these upper limits imply lower limits on the interior magnetic field to B-G1.9 greater than or similar to 12 mu G for G1.9+0.3 and to B-G330 greater than or similar to 8 mu G for G330.2+1.0. In a hadronic scenario, the low ambient densities and the large distances to the SNRs result in very low predicted fluxes, for which the H.E.S.S. upper limits are not constraining.
Monthly notices of the Royal Astronomical Society
10.1093/mnras/stu459
0035-8711
1365-2966
wos:2014
WOS:000336249300061
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., iurii.sushch@nwu.ac.za
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Particle Physics and
Astronomy Research Council (PPARC); IPNP of the Charles University;
South African Department of Science and Technology; National Research
Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
ISM: individual objects: SNR G1.9+0.3
eng
uncontrolled
ISM: individual objects: SNR G330.2+1.0
eng
uncontrolled
ISM: magnetic fields
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
gamma-rays: ISM
Institut für Physik und Astronomie
Referiert
38070
2014
2014
eng
10
562
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
Search for extended gamma-ray emission around AGN with HESS and Fermi-LAT
Context. Very-high-energy (VHE; E > 100 GeV) gamma-ray emission from blazars inevitably gives rise to electron-positron pair production through the interaction of these gamma-rays with the extragalactic background light (EBL). Depending on the magnetic fields in the proximity of the source, the cascade initiated from pair production can result in either an isotropic halo around an initially- beamed source or a magnetically- broadened cascade :aux.
Aims. Both extended pair-halo (PH) and magnetically broadened cascade (MBC) emission from regions surrounding the blazars 1ES 1101-232, IRS 0229+200, and PKS 2155-304 were searched for using VHE y-ray data taken with the High Energy Stereoscopic System (HESS.) and high-energy (HE; 100 MeV < E < 100 GeV) gamma-ray data with the Fermi Large Area Telescope (LAT).
Methods. By comparing the angular distributions of the reconstructed gamma-ray events to the angular profiles calculated from detailed theoretical models, the presence of PH and MBC was investigated.
Results. Upper limits on the extended emission around lES 1101-232, lES 0229+200, and PKS 2155-304 are found to be at a level of a few per cent of the Crab nebula flux above 1 TeV, depending on the assumed photon index of the cascade emission. Assuming strong extra-Galactic magnetic field (EGME) values, >10(-12) G, this limits the production of pair haloes developing from electromagnetic cascades. For weaker magnetic fields, in which electromagnetic cascades would result in MBCs. EGMF strengths in the range (0.3-3) x 10(-15) G were excluded for PKS 2155-304 at the 99% confidence level, under the assumption of a 1 Mpc coherence length.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201322510
0004-6361
1432-0746
wos:2014
A145
WOS:000332161800080
Stycz, K (reprint author), DESY, D-15738 Zeuthen, Germany., stefan.ohm@le.ac.uk; kornelia.stycz@desy.de; taylora@cp.dias.ie
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Fussling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
D. Malyshev
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
galaxies: magnetic fields
eng
uncontrolled
intergalactic medium
eng
uncontrolled
BL Lacertae objects: individual: PKS 2155-304
eng
uncontrolled
BL Lacertae objects: individual: lES 1101-232
eng
uncontrolled
BL Lacertae objects: individual: lES 0229+200
Institut für Physik und Astronomie
Referiert
37889
2014
2014
eng
6
565
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
Search for TeV Gamma-ray emission from GRB 100621A, an extremely bright GRB in X-rays, with HESS
The long gamma-ray burst (GRB) 100621A, at the time the brightest X-ray transient ever detected by Swift-XRT in the 0.3-10 keV range, has been observed with the H.E.S.S. imaging air Cherenkov telescope array, sensitive to gamma radiation in the very-high-energy (VHE, >100 GeV) regime. Due to its relatively small redshift of z similar to 0.5, the favourable position in the southern sky and the relatively short follow-up time (<700 s after the satellite trigger) of the H.E.S.S. observations, this GRB could be within the sensitivity reach of the HESS. instrument. The analysis of the HESS. data shows no indication of emission and yields an integral flux upper limit above similar to 380 GeV of 4.2 x 10(-12) cm(-2) s(-1) s (95% confidence level), assuming a simple Band function extension model. A comparison to a spectral-temporal model, normalised to the prompt flux at sub-MeV energies, constraints the existence of a temporally extended and strong additional hard power law, as has been observed in the other bright X-ray GRB 130427A. A comparison between the HESS. upper limit and the contemporaneous energy output in X-rays constrains the ratio between the X-ray and VHE gamma-ray fluxes to be greater than 0.4. This value is an important quantity for modelling the afterglow and can constrain leptonic emission scenarios, where leptons are responsible for the X-ray emission and might produce VHE gamma rays.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201322984
0004-6361
1432-0746
wos:2014
A16
WOS:000336730900016
Lennarz, D (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany., dirk.lennarz@gatech.edu
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK
Science and Technology Facilities Council (STEC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dicldnson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
B. Giebels
J. F. Glicenstein
M-H Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
D. Lennarz
T. Lohse
A. Lopatin
C-C Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P-O Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
P. H. T. Tam
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H-S Zechlin
eng
uncontrolled
gamma rays: general
eng
uncontrolled
gamma-ray burst: individual: GRB 100621A
eng
uncontrolled
gamma rays: stars
eng
uncontrolled
X-rays: stars
Institut für Physik und Astronomie
Referiert
37955
2014
2014
eng
10
564
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
Flux upper limits for 47 AGN observed with HESS in 2004-2011
Context. About 40% of the observation time of the High Energy Stereoscopic System (H.E.S.S.) is dedicated to studying active galactic nuclei (AGN), with the aim of increasing the sample of known extragalactic very-high-energy (VHE, E > 100 GeV) sources and constraining the physical processes at play in potential emitters.
Aims. H.E.S.S. observations of AGN, spanning a period from April 2004 to December 2011, are investigated to constrain their gamma-ray fluxes. Only the 47 sources without significant excess detected at the position of the targets are presented.
Methods. Upper limits on VHE fluxes of the targets were computed and a search for variability was performed on the nightly time scale.
Results. For 41 objects, the flux upper limits we derived are the most constraining reported to date. These constraints at VHE are compared with the flux level expected from extrapolations of Fermi-LAT measurements in the two-year catalog of AGN. The H.E.S.S. upper limits are at least a factor of two lower than the extrapolated Fermi-LAT fluxes for 11 objects Taking into account the attenuation by the extragalactic background light reduces the tension for all but two of them, suggesting intrinsic curvature in the high-energy spectra of these two AGN.
Conclusions. Compilation efforts led by current VHE instruments are of critical importance for target-selection strategies before the advent of the Cherenkov Telescope Array (CTA).
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201322897
0004-6361
1432-0746
wos:2014
A9
WOS:000334671000009
Biteau, J (reprint author), Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France., biteau@in2p3.fr; david.sanchez@lapp.in2p3.fr
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. dewilt
H. J. Dicldnson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de Los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
galaxies: active
Institut für Physik und Astronomie
Referiert
38072
2014
2014
eng
5
562
article
EDP Sciences
Les Ulis
1
--
--
--
HESS observations of the Crab during its March 2013 GeV gamma-ray flare
Context. On March 4, 2013 the Fermi-EAT and AGILE reported a flare from the direction of the Crab nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its quiescent level. Simultaneous observations in other energy bands give us hints about the emission processes during the flare episode and the physics of pulsar wind nebulae in general.
Aims. We search for variability in the emission of the Crab nebula at very-high energies (VHF,; E > 100 GeV), using contemporaneous data taken with the H.E.S.S. array of Cherenkov telescopes.
Methods. Observational data taken with the H.E.S.S. instrument on five consecutive days during the flare were analysed for the flux and spectral shape of the emission from the Crab nebula. Night-wise light curves are presented with energy thresholds of 1 TeV and 5 TeV.
Results. The observations conducted with H.E.S.S. on March 6 to March 10, 2013 show no significant changes in the flux. They limit the variation in the integral flux above 1 TeV to less than 63% and the integral flux above 5 TeV to less than 78% at a 95% confidence level.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201323013
0004-6361
1432-0746
wos:2014
L4
WOS:000332161800140
Balzer, A (reprint author), DESY, D-15738 Zeuthen, Germany., arnim.balzer@desy.de; dieter.horns@desy.de; kornelia.stycz@desy.de
Namibian authorities and of the University of Namibia; German Ministry
for Education and Research (BMBF); Max Planck Society; German Research
Foundation (DFG); French Ministry for Research; CNRS-IN2P3;
Astroparticle Interdisciplinary Programmne of the CNRS; UK Science and
Technology Facilities Council (STFC); IPNP of the Charles University;
Czech Science Foundation; Polish Ministry of Science and Higher
Education; South African Department of Science and Technology; National
Research Foundation; University of Namibia
H. E. S. S. Collaboration
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. de Wilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
Dieter Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
Kornelia Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
gamma rays: ISM
eng
uncontrolled
ISM: individual objects: Crab nebula
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
relativistic processes
Institut für Physik und Astronomie
Referiert
37949
2014
2014
eng
2828
2836
9
3
439
article
Oxford Univ. Press
Oxford
Hess Collaboration
1
--
--
--
HESS J1640-465-an exceptionally luminous TeV gamma-ray supernova remnant
The results of follow-up observations of the TeV gamma-ray source HESS J1640-465 from 2004 to 2011 with the High Energy Stereoscopic System (HESS) are reported in this work. The spectrum is well described by an exponential cut-off power law with photon index Gamma = 2.11 +/- 0.09(stat) +/- 0.10(sys), and a cut-off energy of E-2 = 6.0(-1.2)(+2.0) TeV. The TeV emission is significantly extended and overlaps with the northwestern part of the shell of the SNR G338.3-0.0. The new HESS results, a re-analysis of archival XMM-Newton data and multiwavelength observations suggest that a significant part of the gamma-ray emission from HESS J1640-465 originates in the supernova remnant shell. In a hadronic scenario, as suggested by the smooth connection of the GeV and TeV spectra, the product of total proton energy and mean target density could be as high as W(p)n(H) similar to 4 x 10(52)(d/10kpc)(2) erg cm(-3).
Monthly notices of the Royal Astronomical Society
10.1093/mnras/stu139
0035-8711
1365-2966
wos:2014
WOS:000334114900046
Abramowski, A (reprint author), Univ Hamburg, Inst Experimentalphys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Science and Technology
Facilities Council (STFC); IPNP of the Charles University; Czech Science
Foundation; Polish Ministry of Science and Higher Education; South
African Department of Science and Technology; National Research
Foundation; University of Namibia; Humboldt foundation; NASA
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
Michael K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
Marek Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
Krzysztof Katarzynski
Uli Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
Michael Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
Olaf Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
Christopher van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
ISM: individual objects: G338.3-0.0
eng
uncontrolled
ISM: supernova remnants
Institut für Physik und Astronomie
Referiert
39253
2015
2015
eng
1163
1169
7
2
446
article
Oxford Univ. Press
Oxford
HESS Collaboration
1
--
--
--
Discovery of the VHE gamma-ray source HESS J1832-093 in the vicinity of SNR G22.7-0.2
Monthly notices of the Royal Astronomical Society
10.1093/mnras/stu2148
0035-8711
1365-2966
wos:2015
WOS:000350272200004
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., fabio.acero@cea.fr; laffon@cenbg.in2p3.fr
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Science and Technology
Facilities Council (STFC); IPNP of the Charles University; Czech Science
Foundation; Polish Ministry of Science and Higher Education; South
African Department of Science and Technology; National Research
Foundation; University of Namibia; National Science Foundation
[AST-9800334, AST-0098562, AST-0100793]; National Aeronautics and Space
Administration; National Science Foundation
Attila Abramowski
F. Acero
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
A. C. Clapson
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
Marek Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
Krzysztof Katarzynski
Uli Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
Manuel Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
Christopher van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
astroparticle physics
eng
uncontrolled
ISM: individual objects: HESS J1832-093
eng
uncontrolled
ISM: individual objects: SNR G22.7-0.2
eng
uncontrolled
gamma-rays: general
Institut für Physik und Astronomie
Referiert
37715
2014
2014
eng
3640
3642
3
4
441
other
Oxford Univ. Press
Oxford
HESS Collaboration
1
--
--
--
HESS J1640-465 - an exceptionally luminous TeV gamma-ray supernova remnant (vol 439, pg 2828, 2014)
Monthly notices of the Royal Astronomical Society
10.1093/mnras/stu826
0035-8711
1365-2966
wos:2014
WOS:000338764700061
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., stefan.ohm@desy.de
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
Michael Mayer
T. J. L. McComb
J. Mehault
P. J. Meintjes
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
J. Vink
H. J. Voelk
F. Volpe
M. Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
V. Zabalza
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
errata, addenda
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
ISM: individual objects: G338.3-0.0
eng
uncontrolled
ISM: supernova remnants
Institut für Physik und Astronomie
Referiert
53097
2018
2018
eng
8
612
article
EDP Sciences
Les Ulis
NANTEN Collaboration HESS Collaboration
1
2018-04-09
2018-04-09
--
HESS J1741-302: a hidden accelerator in the Galactic plane
The H.E.S.S. Collaboration has discovered a new very high energy (VHE, E > 0.1 TeV) gamma-ray source, HESS J1741-302, located in the Galactic plane. Despite several attempts to constrain its nature, no plausible counterpart has been found so far at X-ray and MeV/GeV gamma-ray energies, and the source remains unidentified. An analysis of 145-h of observations of HESS J1741-302 at VHEs has revealed a steady and relatively weak TeV source (similar to 1% of the Crab Nebula flux), with a spectral index of Gamma = 2.3 +/- 0.2(stat) +/- 0.2(sys), extending to energies up to 10 TeV without any clear signature of a cut-off. In a hadronic scenario, such a spectrum implies an object with particle acceleration up to energies of several hundred TeV. Contrary to most H.E.S.S. unidentified sources, the angular size of HESS J1741-302 is compatible with the H.E.S.S. point spread function at VHEs, with an extension constrained to be below 0.068 degrees at a 99% confidence level. The gamma-ray emission detected by H.E.S.S. can be explained both within a hadronic scenario, due to collisions of protons with energies of hundreds of TeV with dense molecular clouds, and in a leptonic scenario, as a relic pulsar wind nebula, possibly powered by the middle-aged (20 kyr) pulsar PSR B1737-30. A binary scenario, related to the compact radio source 1LC 358.266+0.038 found to be spatially coincident with the best fit position of HESS J1741-302, is also envisaged.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201730581
1432-0746
wos:2018
A13
WOS:000429404700013
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science AMP; Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; EGI Federation; Polish National Science Center under the Opus Grant [UMO-2014/13/B/ST9/00945]; [CNRS-IN2P3]
2021-12-13T11:31:25+00:00
sword
importub
filename=package.tar
0dfb93450b204b047ce3e949d1b1caca
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Armand
M. Arrieta
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
S. Colafrancesco
B. Condon
J. Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Donath
J. Dyks
T. Edwards
Kathrin Egberts
G. Emery
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
R. Enokiya
Y. Fukui
T. Hayakawa
T. Okuda
K. Torii
H. Yamamoto
eng
uncontrolled
gamma rays: ISM
eng
uncontrolled
gamma rays: general
eng
uncontrolled
cosmic rays
eng
uncontrolled
ISM: clouds
Physik
Institut für Physik und Astronomie
Import
53087
2018
2018
eng
22
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
A search for very high-energy flares from the microquasars GRS 1915+105, Circinus X-1, and V4641 Sgr using contemporaneous HESS and RXTE observations
Context. Microquasars are potential gamma-ray emitters. Indications of transient episodes of gamma-ray emission were recently reported in at least two systems: Cyg X-1 and Cyg X-3. The identification of additional gamma-ray-emitting microquasars is required to better understand how gamma-ray emission can be produced in these systems. Aims. Theoretical models have predicted very high-energy (VHE) gamma-ray emission from microquasars during periods of transient outburst. Observations reported herein were undertaken with the objective of observing a broadband flaring event in the gamma-ray and X-ray bands. Methods. Contemporaneous observations of three microquasars, GRS 1915+105, Circinus X-1, and V4641 Sgr, were obtained using the High Energy Spectroscopic System (H.E.S.S.) telescope array and the Rossi X-ray Timing Explorer (RXTE) satellite. X-ray analyses for each microquasar were performed and VHE gamma-ray upper limits from contemporaneous H.E.S.S. observations were derived. Results. No significant gamma-ray signal has been detected in any of the three systems. The integral gamma-ray photon flux at the observational epochs is constrained to be I(>560 GeV) < 7.3 x 10(-13) cm(-2) S-1, I(>560 GeV) < 1.2 x 10-(12) cm s(-1), and I(>240 GeV) < 4.5 x 10(-12) cm(-2) s(-1) for GRS 1915+105, Circinus X-1, and V4641 Sgr, respectively. Conclusions. The gamma-ray upper limits obtained using H.E.S.S. are examined in the context of previous Cherenkov telescope observations of microquasars. The effect of intrinsic absorption is modelled for each target and found to have negligible impact on the flux of escaping gamma-rays. When combined with the X-ray behaviour observed using RXTE, the derived results indicate that if detectable VHE gamma-ray emission from microquasars is commonplace, then it is likely to be highly transient.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201527773
1432-0746
wos:2018
A10
WOS:000429404700010
Bordas, P (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Schussler, F (reprint author), CEA Saclay, DSM Irfu, F-91191 Gif Sur Yvette, France.; Ernenwein, JP (reprint author), Aix Marseille Univ, CNRS, IN2P3, CPPM UMR 7346, F-13288 Marseille, France.; Chadwick, PM (reprint author), Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, England.; Dickinson, HJ (reprint author), Iowa State Univ, Ames, IA 50011 USA.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia
2021-12-10T09:32:50+00:00
sword
importub
filename=package.tar
97cba50c8b0b513bba68af016d30d248
Bordas, P.
Schuessler, F.
Ernenwein, J. - P.
Chadwick, P. M.
Dickinson, H. J.
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
E. O. Anguenee
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
E. Birsin
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
P. M. Chadwick
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goya
M. -H. Grondin
M. Grudzinska
D. Hadasch
J. Hahn
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poona
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
I. Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
R. Tuffs
J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venters
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
X-rays: binaries
eng
uncontrolled
X-rays: individuals: GRS 1915+105
eng
uncontrolled
X-rays: individuals: Circinus X-1
eng
uncontrolled
X-rays: individuals: V4641 Sgr
Astronomie und zugeordnete Wissenschaften
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53096
2018
2018
eng
18
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
Population study of Galactic supernova remnants at very high gamma-ray energies with HESS
Shell-type supernova remnants (SNRs) are considered prime candidates for the acceleration of Galactic cosmic rays (CRs) up to the knee of the CR spectrum at E approximate to 3 x 10(15) eV. Our MilkyWay galaxy hosts more than 350 SNRs discovered at radio wavelengths and at high energies, of which 220 fall into the H.E.S.S. Galactic Plane Survey (HGPS) region. Of those, only 50 SNRs are coincident with a H.E.S.S source and in 8 cases the very high-energy (VHE) emission is firmly identified as an SNR. The H.E.S.S. GPS provides us with a legacy for SNR population study in VHE gamma-rays and we use this rich data set to extract VHE flux upper limits from all undetected SNRs. Overall, the derived flux upper limits are not in contradiction with the canonical CR paradigm. Assuming this paradigm holds true, we can constrain typical ambient density values around shell-type SNRs to n <= 7 cm(-3) and electron-to-proton energy fractions above 10 TeV to epsilon(ep) <= 5 x 10(-3). Furthermore, comparisons of VHE with radio luminosities in non-interacting SNRs reveal a behaviour that is in agreement with the theory of magnetic field amplification at shell-type SNRs.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201732125
1432-0746
wos:2018
A3
WOS:000429404700003
Hahn, J; Marandon, V (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Chaves, RCG; Fernandez, D; Renaud, M (reprint author), Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; EGI Federation
2021-12-13T11:18:44+00:00
sword
importub
filename=package.tar
8e273a31616d64d091d2c7f58ef83866
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
E. O. Anguener
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
S. Colafrancesco
B. Condon
J. Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
G. Emery
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
B. Giebels
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
S. Safi-Harb
V. Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
ISM: supernova remnants
Physik
Institut für Physik und Astronomie
Import
50442
2019
2019
eng
18
621
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2019-01-15
--
--
Particle transport within the pulsar wind nebula HESS J1825-137
Context. We present a detailed view of the pulsar wind nebula (PWN) HESS J1825-137. We aim to constrain the mechanisms dominating the particle transport within the nebula, accounting for its anomalously large size and spectral characteristics. Aims. The nebula was studied using a deep exposure from over 12 years of H.E.S.S. I operation, together with data from H.E.S.S. II that improve the low-energy sensitivity. Enhanced energy-dependent morphological and spatially resolved spectral analyses probe the very high energy (VHE, E > 0.1 TeV) gamma-ray properties of the nebula. Methods. The nebula emission is revealed to extend out to 1.5 degrees from the pulsar, similar to 1.5 times farther than previously seen, making HESS J1825-137, with an intrinsic diameter of similar to 100 pc, potentially the largest gamma-ray PWN currently known. Characterising the strongly energy-dependent morphology of the nebula enables us to constrain the particle transport mechanisms. A dependence of the nebula extent with energy of R proportional to E alpha with alpha = -0.29 +/- 0.04(stat) +/- 0.05(sys) disfavours a pure diffusion scenario for particle transport within the nebula. The total gamma-ray flux of the nebula above 1 TeV is found to be (1.12 +/- 0.03(stat) +/- 0.25(sys)) +/- 10(-11) cm(-2) s(-1), corresponding to similar to 64% of the flux of the Crab nebula. Results. HESS J1825-137 is a PWN with clearly energy-dependent morphology at VHE gamma-ray energies. This source is used as a laboratory to investigate particle transport within intermediate-age PWNe. Based on deep observations of this highly spatially extended PWN, we produce a spectral map of the region that provides insights into the spectral variation within the nebula.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201834335
1432-0746
wos:2019
A116
WOS:000455572500001
Mitchell, AMW (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Caroff, S (reprint author), Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France.; Mitchell, AMW (reprint author), Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation; Centre National de la Recherche Scientifique (CNRS/IN2P3); Commissariat a Energy Commission; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science& Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; Centre National de la Recherche Scientifique (CNRS/INSU)Centre National de la Recherche Scientifique (CNRS)
2021-04-20T12:30:01+00:00
sword
importub
filename=package.tar
1002341c58905c946a2f6e28105aa650
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Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
T. Chand
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
M. Kraus
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
T. Lohse
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
C. Moore
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I Oya
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
H. Schutte
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. M. Wagner
R. White
A. Wierzcholska
R. Yang
H. Yoneda
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
acceleration of particles
eng
uncontrolled
convection
eng
uncontrolled
diffusion
eng
uncontrolled
pulsars: general
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53100
2018
2018
eng
23
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
A search for new supernova remnant shells in the Galactic plane with HESS
A search for new supernova remnants (SNRs) has been conducted using TeV gamma-ray data from the H.E.S.S. Galactic plane survey. As an identification criterion, shell morphologies that are characteristic for known resolved TeV SNRs have been used. Three new SNR candidates were identified in the H.E.S.S. data set with this method. Extensive multiwavelength searches for counterparts were conducted. A radio SNR candidate has been identified to be a counterpart to HESS J1534-571. The TeV source is therefore classified as a SNR. For the other two sources, HESS J1614-518 and HESS J1912 + 101, no identifying counterparts have been found, thus they remain SNR candidates for the time being. TeV-emitting SNRs are key objects in the context of identifying the accelerators of Galactic cosmic rays. The TeV emission of the relativistic particles in the new sources is examined in view of possible leptonic and hadronic emission scenarios, taking the current multiwavelength knowledge into account.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201730737
1432-0746
wos:2018
A8
WOS:000429404700008
Capasso, M; Gottschall, D; Puhlhofer, G (reprint author), Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; EGI Federation
2021-12-13T11:52:20+00:00
sword
importub
filename=package.tar
071eedd4d0dfddcdefea08a0b4de33a6
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
M. Coffaro
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitche
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
S. Richter
F. Rieger
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
K. Stycz
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Wale
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
A. Bamba
Y. Fukui
H. Sano
S. Yoshiike
eng
uncontrolled
astroparticle physics
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
cosmic rays
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
51180
2018
2018
eng
10
619
article
EDP Sciences
Les Ulis
HESS Collaboration Fermi LAT Collaborators
1
2018-11-08
2018-11-08
--
The gamma-ray spectrum of the core of Centaurus A as observed with HESS and Fermi-LAT
Centaurus A (Cen A) is the nearest radio galaxy discovered as a very-high-energy (VHE; 100 GeV-100 TeV) gamma-ray source by the High Energy Stereoscopic System (H.E.S.S.). It is a faint VHE gamma-ray emitter, though its VHE flux exceeds both the extrapolation from early Fermi-LAT observations as well as expectations from a (misaligned) single-zone synchrotron-self Compton (SSC) description. The latter satisfactorily reproduces the emission from Cen A at lower energies up to a few GeV. New observations with H.E.S.S., comparable in exposure time to those previously reported, were performed and eight years of Fermi-LAT data were accumulated to clarify the spectral characteristics of the gamma-ray emission from the core of Cen A. The results allow us for the first time to achieve the goal of constructing a representative, contemporaneous gamma-ray core spectrum of Cen A over almost five orders of magnitude in energy. Advanced analysis methods, including the template fitting method, allow detection in the VHE range of the core with a statistical significance of 12 sigma on the basis of 213 hours of total exposure time. The spectrum in the energy range of 250 GeV-6 TeV is compatible with a power-law function with a photon index Gamma = 2.52 +/- 0.13(stat) +/- 0.20(sys). An updated Fermi-LAT analysis provides evidence for spectral hardening by Delta Gamma similar or equal to 0.4 +/- 0.1 at gamma-ray energies above 2.8(-0.6)(+1.0) GeV at a level of 4.0 sigma. The fact that the spectrum hardens at GeV energies and extends into the VHE regime disfavour a single-zone SSC interpretation for the overall spectral energy distribution (SED) of the core and is suggestive of a new gamma-ray emitting component connecting the high-energy emission above the break energy to the one observed at VHE energies. The absence of significant variability at both GeV and TeV energies does not yet allow disentanglement of the physical nature of this component, though a jet-related origin is possible and a simple two-zone SED model fit is provided to this end.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201832640
1432-0746
wos:2018
A71
WOS:000449725100001
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa., phdmitry@gmail.com; jmagill@umd.edu
2021-06-30T10:32:12+00:00
sword
importub
filename=package.tar
5c2c896f570f6942638270f819239b3d
Abdalla, H.
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Armand
M. Arrieta
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
S. Colafrancesco
B. Condon
J. Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Donath
J. Dyks
T. Edwards
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. Fernandes
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
Iurii Sushch
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
J. D. Magill
S. Buson
C. C. Cheung
J. S. Perkins
Y. Tanaka
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
radiation mechanisms: non-thermal
Astronomie und zugeordnete Wissenschaften
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
34607
2013
2013
eng
11
559
article
EDP SCIENCES S A
LES ULIS CEDEX A
HESS Collaboration
1
--
--
--
Discovery of very high energy gamma-ray emission from the BL Lacertae
object PKS0301-243 with HESS
The active galactic nucleus PKS 0301-243 (z = 0.266) is a high-synchrotron-peaked BL Lac object that is detected at high energies (HE, 100 MeV < E < 100 GeV) by Fermi/LAT. This paper reports on the discovery of PKS 0301-243 at very high energies (E > 100 GeV) by the High Energy Stereoscopic System (H.E.S.S.) from observations between September 2009 and December 2011 for a total live time of 34.9 h. Gamma rays above 200 GeV are detected at a significance of 9.4 sigma. A hint of variability at the 2.5 sigma level is found. An integral flux I(E > 200GeV) = (3.3 +/- 1.1(stat) +/- 0.7(syst)) x 10(-12) ph cm(-2) s(-1) and a photon index Gamma = 4.6 +/- 0.7(stat) +/- 0.2(syst) are measured. Multi-wavelength light curves in HE, X-ray and optical bands show strong variability, and a minimal variability timescale of eight days is estimated from the optical light curve. A single-zone leptonic synchrotron self-Compton scenario satisfactorily reproduces the multi-wavelength data. In this model, the emitting region is out of equipartition and the jet is particle dominated. Because of its high redshift compared to other sources observed at TeV energies, the very high energy emission from PKS 0301-243 is attenuated by the extragalactic background light (EBL) and the measured spectrum is used to derive an upper limit on the opacity of the EBL.
ASTRONOMY & ASTROPHYSICS
10.1051/0004-6361/201321639
0004-6361
1432-0746
wos:2011-2013
A136
WOS:000327847200136
Wouters, D (reprint author), CEA Saclay, DSM Irfu, F-91191 Gif Sur Yvette, France.
, jlenain@lpnhe.in2p3.fr; denis.wouters@cea.fr
German Ministry for Education and Research (BMBF); Max Planck Society;
German Research Foundation (DFG); French Ministry for Research;
CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; U.K.
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Czech Science Foundation; Polish Ministry of Science and
Higher Education; South African Department of Science and Technology;
National Research Foundation; University of Namibia
Attila Abramowski
F. Acero
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
E. Bissaldi
Jonathan Biteau
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
R. Chalme-Calvet
Ryan C. G. Chaves
A. Cheesebrough
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O&rsquo Drury
C.
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
B. Giebels
J. F. Glicenstein
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
J. Harris
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
R. Marx
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
M. Meyer
R. Moderski
M. Mohamed
E. Moulin
T. Murach
C. L. Naumann
M. de Naurois
D. Nedbal
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
M. Vorster
S. J. Wagner
P. Wagner
M. Ward
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
galaxies: active
eng
uncontrolled
BL Lacertae objects: general
eng
uncontrolled
BL Lacertae objects: individual: PKS 0301-243
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
radiation mechanisms: non-thermal
50941
2018
2018
eng
14
620
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2018-12-03
2018-12-03
--
First ground-based measurement of sub-20 GeV to 100 GeV gamma-Rays from the Vela pulsar with HESS II
Aims. We report on the measurement and investigation of pulsed high-energy y-ray emission from the Vela pulsar, PSR B0833-45, based on observations with the largest telescope of H.E.S.S., CT5, in monoscopic mode, and on data obtained with the Fermi-LAT. Methods. Data from 40.3 h of observations carried out with the H.E.S.S. II array from 2013 to 2015 have been used. A dedicated very low-threshold event reconstruction and analysis pipeline was developed to achieve the lowest possible energy threshold. Eight years of Fermi-LAT data were analysed and also used as reference to validate the CT5 telescope response model and analysis methods. Results. A pulsed gamma-ray signal at a significance level of more than 15 sigma is detected from the P2 peak of the Vela pulsar light curve. Of a total of 15 835 events, more than 6000 lie at an energy below 20 GeV, implying a significant overlap between H.E.S.S. II-CT5 and the Fermi-LAT. While the investigation of the pulsar light curve with the LAT confirms characteristics previously known up to 20 GeV in the tens of GeV energy range, CT5 data show a change in the pulse morphology of P2, i.e. an extreme sharpening of its trailing edge, together with the possible onset of a new component at 3.4 sigma significance level. Assuming a power-law model for the P2 spectrum, an excellent agreement is found for the photon indices (Gamma similar or equal to 4.1) obtained with the two telescopes above 10 GeV and an upper bound of 8% is derived on the relative offset between their energy scales. Using data from both instruments, it is shown however that the spectrum of P2 in the 10-100 GeV has a pronounced curvature; this is a confirmation of the sub-exponential cut-off form found at lower energies with the LAT. This is further supported by weak evidence of an emission above 100 GeV obtained with CT5. In contrast, converging indications are found from both CT5 and LAT data for the emergence of a hard component above 50 GeV in the leading wing (LW2) of P2, which possibly extends beyond 100 GeV. Conclusions. The detection demonstrates the performance and understanding of CT5 from 100 GeV down to the sub-20 GeV domain, i.e. unprecedented low energy for ground-based gamma-ray astronomy. The extreme sharpening of the trailing edge of the P2 peak found in the H.E.S.S. II light curve of the Vela pulsar and the possible extension beyond 100 GeV of at least one of its features, LW2, provide further constraints to models of gamma-Ray emission from pulsars.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201732153
1432-0746
wos:2018
A66
WOS:000452434100001
Venter, C (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.; Holler, M (reprint author), Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.; Tavernier, T (reprint author), Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France.; Djannati-Atai, A (reprint author), Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,CNRS,IN2P3, 10 Rue Alice Domon Leonie Duquet, F-75205 Paris, France.; Giavitto, G (reprint author), DESY, D-15738 Zeuthen, Germany.
2021-06-14T05:55:27+00:00
sword
importub
filename=package.tar
7d4910317472fdd902f88d58b66c5bb0
Venter, C.
Holler, M.
Tavernier, T.
Djannati-Atai, A.
Giavitto, G.
false
true
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernlohr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
S. Chandra
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krüger
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I Oya
M. Padovani
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
F. Spanier
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. M. Wagner
R. White
A. Wierzcholska
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
M. Kerr
S. Johnston
R. M. Shannon
eng
uncontrolled
gamma rays: stars
eng
uncontrolled
pulsars: individual: PSR B0833-45
eng
uncontrolled
radiation mechanisms: non-thermal
Astronomie und zugeordnete Wissenschaften
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
55360
2017
2017
eng
11
598
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2017-01-27
2017-01-27
--
Characterizing the gamma-ray long-term variability of PKS2155 304 with HESS and Fermi-LAT
Studying the temporal variability of BL Lac objects at the highest energies provides unique insights into the extreme physical processes occurring in relativistic jets and in the vicinity of super-massive black holes. To this end, the long-term variability of the BL Lac object PKS 2155 304 is analyzed in the high (HE, 100MeV < E < 300 GeV) and very high energy (VHE, E > 200 GeV) gamma-ray domain. Over the course of similar to 9 yr of H. E. S. S. observations the VHE light curve in the quiescent state is consistent with a log-normal behavior. The VHE variability in this state is well described by flicker noise (power-spectral-density index beta(VHE) = 1 .10(+ 0 : 10) (0 : 13)) on timescales larger than one day. An analysis of similar to 5.5 yr of HE Fermi-LAT data gives consistent results (beta(HE) = 1 : 20(+ 0 : 21) (0 : 23), on timescales larger than 10 days) compatible with the VHE findings. The HE and VHE power spectral densities show a scale invariance across the probed time ranges. A direct linear correlation between the VHE and HE fluxes could neither be excluded nor firmly established. These long-term-variability properties are discussed and compared to the red noise behavior (beta similar to 2) seen on shorter timescales during VHE-flaring states. The difference in power spectral noise behavior at VHE energies during quiescent and flaring states provides evidence that these states are influenced by different physical processes, while the compatibility of the HE and VHE long-term results is suggestive of a common physical link as it might be introduced by an underlying jet-disk connection.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201629419
1432-0746
0004-6361
wos:2017
A39
WOS:000394465000039
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
2022-06-27T14:48:37+00:00
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importub
filename=package.tar
d9f0f8d3f172ab3793336ab0ef5c9905
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true
H. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernlorhr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
D. Hadasch
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kie Ff Er
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
E. Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
Ff Ert
L. Stawarz
R. Steenkamp
Christian Michael Stegmann
F. Stinzing
K. Stycz
I. Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
galaxies: active
eng
uncontrolled
BL Lacertae objects: individual: PKS 2155-304
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
galaxies: jets
eng
uncontrolled
galaxies: nuclei
eng
uncontrolled
radiation mechanisms: non-thermal
Astronomie und zugeordnete Wissenschaften
Institut für Physik und Astronomie
Referiert
Import
48936
2019
2019
eng
3886
3891
6
3
486
article
Oxford Univ. Press
Oxford
H E S S Collaboration
1
--
2019-04-10
--
H.E.S.S. observations of the flaring gravitationally lensed galaxy PKS 1830-211
PKS 1830-211 is a known macrolensed quasar located at a redshift of z = 2.5. Its highenergy gamma-ray emission has been detected with the Fermi-Large Area Telescope (LAT) instrument and evidence for lensing was obtained by several authors from its high-energy data. Observations of PKS 1830-211 were taken with the High Energy Stereoscopic System (H.E.S.S.) array of Imaging Atmospheric Cherenkov Telescopes in 2014 August, following a flare alert by the Fermi-LAT Collaboration. The H.E.S.S observations were aimed at detecting a gamma-ray flare delayed by 20-27 d from the alert flare, as expected from observations at other wavelengths. More than 12 h of good-quality data were taken with an analysis threshold of similar to 67 GeV. The significance of a potential signal is computed as a function of the date and the average significance over the whole period. Data are compared to simultaneous observations by Fermi-LAT. No photon excess or significant signal is detected. An upper limit on PKS 1830-211 flux above 67 GeV is computed and compared to the extrapolation of the Fermi-LAT flare spectrum.
Monthly notices of the Royal Astronomical Society
10.1093/mnras/stz1031
0035-8711
1365-2966
wos:2019
WOS:000474903500069
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation; Centre National de la Recherche Scientifique (CNRS/IN2P3); UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; South African Department of Science and Technology; University of Namibia; National Commission on Research, Science and Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; (CEA)French Atomic Energy Commission; National Research Foundation; Centre National de la Recherche Scientifique (CNRS/INSU)Centre National de la Recherche Scientifique (CNRS)
2021-01-15T14:44:38+00:00
sword
importub
filename=package.tar
079ec04b2dd0ec0ae734aa6c986defd1
false
true
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buchele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
T. Chand
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V. Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J. -P. Ernenwein
S. Eschbach
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu. Komin
K. Kosack
M. Kraus
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
R. Lopez-Coto
M. Lorentz
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
C. Moore
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V. Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
H. Schutte
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. M. Wagner
R. White
A. Wierzcholska
R. Yang
H. Yoneda
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
gravitational lensing: strong
eng
uncontrolled
diffuse radiation
eng
uncontrolled
gamma-rays: galaxies
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
35174
2013
2013
eng
7
551
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
HESS observations of the binary system PSR B1259-63/LS 2883 around the 2010/2011 periastron passage
Aims. We present very high energy (VHE; E > 100 GeV) data from the gamma-ray binary system PSR B1259-63/LS 2883 taken around its periastron passage on 15th of December 2010 with the High Energy Stereoscopic System (H. E. S. S.) of Cherenkov Telescopes. We aim to search for a possible TeV counterpart of the GeV flare detected by the Fermi LAT. In addition, we aim to study the current periastron passage in the context of previous observations taken at similar orbital phases, testing the repetitive behaviour of the source.
Methods. Observations at VHEs were conducted with H.E.S.S. from 9th to 16th of January 2011. The total dataset amounts to similar to 6 h of observing time. The data taken around the 2004 periastron passage were also re-analysed with the current analysis techniques in order to extend the energy spectrum above 3 TeV to fully compare observation results from 2004 and 2011.
Results. The source is detected in the 2011 data at a significance level of 11.5 sigma revealing an averaged integral flux above 1 TeV of (1.01 +/- 0.18(stat) +/- 0.20(sys)) x 10(-12) cm(-2) s(-1). The differential energy spectrum follows a power-law shape with a spectral index Gamma = 2.92 +/- 0.30(stat) +/- 0.20(sys) and a flux normalisation at 1 TeV of N-0 = (1.95 +/- 0.32(stat) +/- 0.39(sys)) x 10(-12) TeV-1 cm(-2) s(-1). The measured light curve does not show any evidence for variability of the source on the daily scale. The re-analysis of the 2004 data yields results compatible with the published ones. The differential energy spectrum measured up to similar to 10 TeV is consistent with a power law with a spectral index Gamma = 2.81 +/- 0.10(stat) +/- 0.20(sys) and a flux normalisation at 1 TeV of N-0 = (1.29 +/- 0.08(stat) +/- 0.26(sys)) x 10(-12) TeV-1 cm(-2) s(-1).
Conclusions. The measured integral flux and the spectral shape of the 2011 data are compatible with the results obtained around previous periastron passages. The absence of variability in the H.E.S.S. data indicates that the GeV flare observed by Fermi LAT in the time period covered also by H.E.S.S. observations originates in a different physical scenario than the TeV emission. Moreover, the comparison of the new results to the results from the 2004 observations made at a similar orbital phase provides a stronger evidence of the repetitive behaviour of the source.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201220612
0004-6361
wos:2011-2013
A94
WOS:000316460600094
de Naurois, M (reprint author), Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France., denauroi@in2p3.fr; yusushch@physik.hu-berlin.de
German Ministry for Education and Research (BMBF); Max Planck Society;
French Ministry for Research; CNRS-IN2P3; Astroparticle
Interdisciplinary Programme of the CNRS; UK Particle Physics and
Astronomy Research Council (PPARC); IPNP of the Charles University;
South African Department of Science and Technology; National Research
Foundation; University of Namibia
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
Jonathan Biteau
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
Ryan C. G. Chaves
A. Cheesebrough
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Kathrin Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
B. Glueck
D. Goering
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
D. Hampf
J. Harris
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Markus Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu Komin
K. Kosack
R. Kossakowski
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
J. Masbou
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
R. Moderski
M. Mohamed
E. Moulin
C. L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
N. Nguyen
J. Niemiec
S. J. Nolan
L. Oakes
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J. L. Skilton
H. Sol
G. Spengler
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
S. Vorobiov
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
P. Willmann
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
gamma rays: general
eng
uncontrolled
pulsars: individual: PSR B1259-63
eng
uncontrolled
X-rays: binaries
eng
uncontrolled
stars: individual: LS 2883
Institut für Physik und Astronomie
Referiert
53343
2018
2018
eng
5
610
article
EDP Sciences
Les Ulis
1
2018-03-02
2018-03-02
--
Detection of variable VHE gamma-ray emission from the extra-galactic gamma-ray binary LMC P3
Context. Recently, the high-energy (HE, 0.1-100 GeV) gamma-ray emission from the object LMC P3 in the Large Magellanic Cloud (LMC) has been discovered to be modulated with a 10.3-day period, making it the first extra-galactic gamma-ray binary. Aims. This work aims at the detection of very-high-energy (VHE, >100 GeV) gamma-ray emission and the search for modulation of the VHE signal with the orbital period of the binary system. Methods. LMC P3 has been observed with the High Energy Stereoscopic System (H.E.S.S.); the acceptance-corrected exposure time is 100 h. The data set has been folded with the known orbital period of the system in order to test for variability of the emission. Results. VHE gamma-ray emission is detected with a statistical significance of 6.4 sigma. The data clearly show variability which is phase-locked to the orbital period of the system. Periodicity cannot be deduced from the H.E.S.S. data set alone. The orbit-averaged luminosity in the 1-10 TeV energy range is (1.4 +/- 0.2) x 10(35) erg s(-1). A luminosity of (5 +/- 1) x 10(35) erg s(-1) is reached during 20% of the orbit. HE and VHE gamma-ray emissions are anti-correlated. LMC P3 is the most luminous gamma-ray binary known so far.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201732426
1432-0746
wos:2018
L17
WOS:000427146200001
Komin, N (reprint author), Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa.; Haupt, M (reprint author), DESY, D-15738 Zeuthen, Germany., contact.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam
2022-01-07T10:20:17+00:00
sword
importub
filename=package.tar
7654d6f0f813f5185fea829229f84dd1
false
true
Hassan E. Abdalla
H. E. S. S. Collaboration
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Armand
M. Arrieta
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
S. Colafrancesco
B. Condon
J. Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Donath
J. Dyks
T. Edwards
Kathrin Egberts
G. Emery
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
gamma rays: stars
eng
uncontrolled
binaries: general
eng
uncontrolled
stars: massive
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53090
2018
2018
eng
10
612
article
EDP Sciences
Les Ulis
H E S S Collaboration H E S S Collaboration Fermi-LAT Collaboration
1
2018-04-09
2018-04-09
--
The supernova remnant W49B as seen with HESS and Fermi-LAT
The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology remnant, which is interacting with molecular clouds (MC). Gamma-ray observations of SNR-MC associations are a powerful tool to constrain the origin of Galactic cosmic rays, as they can probe the acceleration of hadrons through their interaction with the surrounding medium and subsequent emission of non-thermal photons. We report the detection of a gamma-ray source coincident with W49B at very high energies (VHE; E > 100 GeV) with the H.E.S.S. Cherenkov telescopes together with a study of the source with five years of Fermi-LAT high-energy gamma-ray (0.06-300 GeV) data. The smoothly connected, combined source spectrum, measured from 60 MeV to multi-TeV energies, shows two significant spectral breaks at 304 +/- 20 MeV and 8.4(-2.5)(+2.5) GeV; the latter is constrained by the joint fit from the two instruments. The detected spectral features are similar to those observed in several other SNR-MC associations and are found to be indicative of gamma-ray emission produced through neutral-pion decay.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201527843
1432-0746
wos:2018
A5
WOS:000429404700005
Marandon, V (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Brun, F; Lemoine-Goumard, M (reprint author), Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.; Jogler, T (reprint author), Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.; Jogler, T (reprint author), Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, HW Hansen Expt Phys Lab, Stanford, CA 94305 USA.; Jogler, T (reprint author), Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.; Katsuta, J (reprint author), Hiroshima Univ, Dept Phys Sci, Higashihiroshima, Hiroshima 7398526, Japan.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; EGI Federation; National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA); Department of Energy in the United StatesUnited AtomiqueFrench Atomic Energy Commission; Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in FranceCentre National de la Recherche Scientifique (CNRS); Agenzia Spaziale ItalianaItalian Space Agency; Istituto Nazionale di Fisica Nucleare in ItalyIstituto Nazionale di Fisica Nucleare; Ministry of Education, Culture, Sports, Science and Technology (MEXT)Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); High Energy Accelerator Research Organization (KEK)High Energy Accelerator Research Organization (KEK); Japan Aerospace Exploration Agency (JAXA) in Japan; K. A. Wallenberg FoundationKnut & Alice Wallenberg Foundation; Swedish Research CouncilSwedish Research Council; Swedish National Space Board in Sweden; Istituto Nazionale di Astrofisica in ItalyIstituto FoundationNational Science Foundation (NSF) [AST-9800334, AST-0098562, AST-0100793, AST-0228993, AST-0507657]
2021-12-10T10:34:09+00:00
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Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
O. Anguener
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
D. Hadasch
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
I. Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
J. Katsuta
eng
uncontrolled
gamma rays: general
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
ISM: clouds
Physik
Institut für Physik und Astronomie
Import
53099
2018
2018
eng
61
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
The HESS Galactic plane survey
We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) gamma-rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery of 16 new sources of VHE gamma-rays. The High Energy Spectroscopic System (H.E.S.S.) Galactic plane survey (HGPS) was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The observations amount to nearly 2700 h of quality-selected data, covering the Galactic plane at longitudes from l = 250 degrees to 65 degrees and latitudes vertical bar b vertical bar <= 3 degrees. In addition to the unprecedented spatial coverage, the HGPS also features a relatively high angular resolution (0.08 degrees approximate to 5 arcmin mean point spread function 68% containment radius), sensitivity (less than or similar to 1.5% Crab flux for point-like sources), and energy range (0.2-100 TeV). We constructed a catalog of VHE gamma-ray sources from the HGPS data set with a systematic procedure for both source detection and characterization of morphology and spectrum. We present this likelihood-based method in detail, including the introduction of a model component to account for unresolved, large-scale emission along the Galactic plane. In total, the resulting HGPS catalog contains 78 VHE sources, of which 14 are not reanalyzed here, for example, due to their complex morphology, namely shell-like sources and the Galactic center region. Where possible, we provide a firm identification of the VHE source or plausible associations with sources in other astronomical catalogs. We also studied the characteristics of the VHE sources with source parameter distributions. 16 new sources were previously unknown or unpublished, and we individually discuss their identifications or possible associations. We firmly identified 31 sources as pulsar wind nebulae (PWNe), supernova remnants (SNRs), composite SNRs, or gamma-ray binaries. Among the 47 sources not yet identified, most of them (36) have possible associations with cataloged objects, notably PWNe and energetic pulsars that could power VHE PWNe.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201732098
1432-0746
wos:2018
A1
WOS:000429404700001
Deil, C; Donath, A; Marandon, V (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Chaves, RCG (reprint author), Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France.; Brun, F (reprint author), Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; EGI Federation
2021-12-13T11:42:59+00:00
sword
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filename=package.tar
325a6fb163f2b47e368e1e43a6d85c4d
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true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
E. O. Anguener
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
S. Carrigan
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
S. Colafrancesco
B. Condon
J. Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
G. Emery
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
H. Gast
F. Gate
G. Giavitto
B. Giebels
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
D. Malyshev
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
S. Safi-Harb
V. Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
M. Schandri
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
surveys
eng
uncontrolled
Galaxy: general
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53091
2018
2018
eng
14
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
Deeper HESS observations of Vela Junior (RX J0852.0-4622)
Aims. We study gamma-ray emission from the shell-type supernova remnant (SNR) RXJ0852.0-4622 to better characterize its spectral properties and its distribution over the SNR. Methods. The analysis of an extended High Energy Spectroscopic System (H.E.S.S.) data set at very high energies (E > 100 GeV) permits detailed studies, as well as spatially resolved spectroscopy, of the morphology and spectrum of the whole RXJ0852.0-4622 region. The H.E.S.S. data are combined with archival data from other wavebands and interpreted in the framework of leptonic and hadronic models. The joint Fermi-LAT-H.E.S.S. spectrum allows the direct determination of the spectral characteristics of the parent particle population in leptonic and hadronic scenarios using only GeV-TeV data. Results. An updated analysis of the H.E.S.S. data shows that the spectrum of the entire SNR connects smoothly to the high-energy spectrum measured by Fermi-LAT. The increased data set makes it possible to demonstrate that the H.E.S.S. spectrum deviates significantly from a power law and is well described by both a curved power law and a power law with an exponential cutoff at an energy of E-cut = (6.7 +/- 1.2(stat) +/- 1.2(syst)) TeV. The joint Fermi-LAT-H.E.S.S. spectrum allows the unambiguous identification of the spectral shape as a power law with an exponential cutoff. No significant evidence is found for a variation of the spectral parameters across the SNR, suggesting similar conditions of particle acceleration across the remnant. A simple modeling using one particle population to model the SNR emission demonstrates that both leptonic and hadronic emission scenarios remain plausible. It is also shown that at least a part of the shell emission is likely due to the presence of a pulsar wind nebula around PSR J0855-4644.
Astronomy and astrophysics : an international weekly journal
Morphology studies and resolved spectroscopy
10.1051/0004-6361/201630002
1432-0746
wos:2018
A7
WOS:000429404700007
Sushch, I (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.; Arribas, MP; Schwanke, U (reprint author), Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany.; Komin, N (reprint author), Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; EGI Federation
2021-12-10T11:08:58+00:00
sword
importub
filename=package.tar
c200e6814d51f4f2ba0b91110a50acd0
Sushch, I.
Schwanke, U.
Komin, N.
Arribas, M. Paz
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Bilchele
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
M. Coffaro
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goya
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitche
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
S. Richter
F. Rieger
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
K. Stycz
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
astroparticle physics
eng
uncontrolled
gamma rays: general
eng
uncontrolled
acceleration of particles
eng
uncontrolled
cosmic rays
eng
uncontrolled
ISM: supernova remnants
Astronomie und zugeordnete Wissenschaften
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53101
2018
2018
eng
25
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
The population of TeV pulsar wind nebulae in the HESS Galactic Plane Survey
The nine-year H.E.S.S. Galactic Plane Survey (HGPS) has yielded the most uniform observation scan of the inner Milky Way in the TeV gamma-ray band to date. The sky maps and source catalogue of the HGPS allow for a systematic study of the population of TeV pulsar wind nebulae found throughout the last decade. To investigate the nature and evolution of pulsar wind nebulae, for the first time we also present several upper limits for regions around pulsars without a detected TeV wind nebula. Our data exhibit a correlation of TeV surface brightness with pulsar spindown power (E) over dot. This seems to be caused both by an increase of extension with decreasing (E) over dot, and hence with time, compatible with a power law R-PWN((E) over dot) similar to(E) over dot(0.65 +/- 0.20), and by a mild decrease of TeV gamma-ray luminosity with decreasing (E) over dot, compatible with L-1 (10 TeV) similar to (E) over dot(0.59 +/- 0.21). We also find that the off sets of pulsars with respect to the wind nebula centre with ages around 10 kyr are frequently larger than can be plausibly explained by pulsar proper motion and could be due to an asymmetric environment. In the present data, it seems that a large pulsar off set is correlated with a high apparent TeV efficiency L1- 10 TeV / (E) over dot. In addition to 14 HGPS sources considered firmly identified pulsar wind nebulae and 5 additional pulsar wind nebulae taken from literature, we find 10 HGPS sources that are likely TeV pulsar wind nebula candidates. Using a model that subsumes the present common understanding of the very high-energy radiative evolution of pulsar wind nebulae, we find that the trends and variations of the TeV observables and limits can be reproduced to a good level, drawing a consistent picture of present-day TeV data and theory.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201629377
1432-0746
wos:2018
A2
WOS:000429404700002
Mayer, M (reprint author), Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany.; Gallant, YA (reprint author), Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France.; Valerius, K (reprint author), Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.; Klepser, S (reprint author), DESY, D-15738 Zeuthen, Germany.; Valerius, K (reprint author), Karlsruhe Inst Technol, Inst Nucl Phys, POB 3640, D-76021 Karlsruhe, Germany.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; EGI Federation
2021-12-13T12:00:43+00:00
sword
importub
filename=package.tar
b86c105e23e3b7a8eb9721a2d7205272
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
M. Capasso
J. Carr
S. Carrigan
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
J. Devin
P. dewilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
D. Hadasch
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
E. de Ona Wilhelmi
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
I. Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
R. Tuffs
Y. Uchiyama
K. Valerius
D. J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
catalogs
eng
uncontrolled
surveys
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
pulsars: general
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53089
2018
2018
eng
13
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with HESS
The diffuse very high-energy (VHE; > 100 GeV) gamma-ray emission observed in the central 200 pc of the Milky Way by H.E.S.S. was found to follow dense matter distribution in the central molecular zone (CMZ) up to a longitudinal distance of about 130 pc to the Galactic centre (GC), where the flux rapidly decreases. This was initially interpreted as the result of a burst-like injection of energetic particles 104 yr ago, but a recent more sensitive H.E.S.S. analysis revealed that the cosmic-ray (CR) density profile drops with the distance to the centre, making data compatible with a steady cosmic PeVatron at the GC. In this paper, we extend this analysis to obtain, for the first time, a detailed characterisation of the correlation with matter and to search for additional features and individual gamma-ray sources in the inner 200 pc. Taking advantage of 250 h of H.E.S.S. data and improved analysis techniques, we perform a detailed morphology study of the diffuse VHE emission observed from the GC ridge and reconstruct its total spectrum. To test the various contributions to the total gamma-ray emission, we used an iterative 2D maximum-likelihood approach that allows us to build a phenomenological model of the emission by summing a number of different spatial components. We show that the emission correlated with dense matter covers the full CMZ and that its flux is about half the total diffuse emission flux. We also detect some emission at higher latitude that is likely produced by hadronic collisions of CRs in less dense regions of the GC interstellar medium. We detect an additional emission component centred on the GC and extending over about 15 pc that is consistent with the existence of a strong CR density gradient and confirms the presence of a CR accelerator at the very centre of our Galaxy. We show that the spectrum of full ridge diffuse emission is compatible with that previously derived from the central regions, suggesting that a single population of particles fills the entire CMZ. Finally, we report the discovery of a VHE gamma-ray source near the GC radio arc and argue that it is produced by the pulsar wind nebula candidate G0.13-0.11.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201730824
1432-0746
wos:2018
A9
WOS:000429404700009
Lemiere, A (reprint author), Univ Paris Diderot, CNRS, IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC,Ast, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; EGI Federation
2021-12-10T09:56:10+00:00
sword
importub
filename=package.tar
f091c56b8051ffb115b5f09f7d376b04
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arakawa
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. C. G. Chaves
A. Chen
J. Chevalier
M. Coffaro
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
S. Richter
F. Rieger
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
K. Stycz
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venters
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
gamma rays: general
eng
uncontrolled
gamma rays: ISM
eng
uncontrolled
Galaxy: center
eng
uncontrolled
cosmic rays
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53102
2018
2018
eng
7
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
Detailed spectral and morphological analysis of the shell type supernova remnant RCW 86
Aims. We aim for an understanding of the morphological and spectral properties of the supernova remnant RCW 86 and for insights into the production mechanism leading to the RCW 86 very high-energy gamma-ray emission. Methods. We analyzed High Energy Spectroscopic System (H.E.S.S.) data that had increased sensitivity compared to the observations presented in the RCW 86 H.E.S.S. discovery publication. Studies of the morphological correlation between the 0.5-1 keV X-ray band, the 2-5 keV X-ray band, radio, and gamma-ray emissions have been performed as well as broadband modeling of the spectral energy distribution with two different emission models. Results. We present the first conclusive evidence that the TeV gamma-ray emission region is shell-like based on our morphological studies. The comparison with 2-5 keV X-ray data reveals a correlation with the 0.4-50 TeV gamma-ray emission. The spectrum of RCW 86 is best described by a power law with an exponential cutoff at E-cut = (3.5 +/- 1.2(stat)) TeV and a spectral index of Gamma approximate to 1.6 +/- 0.2. A static leptonic one-zone model adequately describes the measured spectral energy distribution of RCW 86, with the resultant total kinetic energy of the electrons above 1 GeV being equivalent to similar to 0.1% of the initial kinetic energy of a Type Ia supernova explosion (10(51) erg). When using a hadronic model, a magnetic field of B approximate to 100 mu G is needed to represent the measured data. Although this is comparable to formerly published estimates, a standard E-2 spectrum for the proton distribution cannot describe the gamma-ray data. Instead, a spectral index of Gamma(p) approximate to 1.7 would be required, which implies that similar to 7 x 10(49)/n(cm-3) erg has been transferred into high-energy protons with the effective density n(cm-3) = n/1 cm(-3). This is about 10% of the kinetic energy of a typical Type Ia supernova under the assumption of a density of 1 cm(-3).
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201526545
1432-0746
wos:2018
A4
WOS:000429404700004
Jung-Richardt, I (reprint author), Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Australian Research CouncilAustralian Research Council; Science Foundation for Physics within The University of SydneyUniversity of Sydney
2021-12-13T12:08:21+00:00
sword
importub
filename=package.tar
c388a66b51dfe084b83f8c2d949574d7
false
true
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
E. O. Anguener
M. Backes
A. Balzer
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
E. Birsin
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
J. Carr
Sabrina Casanova
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
J. A. Hinton
W. Hofmann
P. Hofverberg
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
M. Lorentz
C. -C. Lu
R. Lui
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
A. S. Seyffert
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
I. Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
R. Tuffs
K. Valerius
J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Weidinger
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
N. Zywucka
eng
uncontrolled
astroparticle physics
eng
uncontrolled
gamma rays: general
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
cosmic rays
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
51948
2018
2018
eng
7
617
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2018-09-20
--
--
The starburst galaxy NGC 253 revisited by HESS and Fermi-LAT
Context. NGC 253 is one of only two starburst galaxies found to emit gamma-rays from hundreds of MeV to multi-TeV energies. Accurate measurements of the very-high-energy (VHE; E> 100 GeV) and high-energy (HE; E > 60 MeV) spectra are crucial to study the underlying particle accelerators, probe the dominant emission mechanism(s) and to study cosmic-ray interaction and transport. Aims. The measurement of the VHE gamma-ray emission of NGC 253 published in 2012 by H.E.S.S. was limited by large systematic uncertainties. Here, the most up to date measurement of the gamma-ray spectrum of NGC 253 is investigated in both HE and VHE gamma-rays. Assuming a hadronic origin of the gamma-ray emission, the measurement uncertainties are propagated into the interpretation of the accelerated particle population. Methods. The data of H.E.S.S. observations are reanalysed using an updated calibration and analysis chain. The improved Fermi-LAT analysis employs more than 8 yr of data processed using pass 8. The cosmic-ray particle population is evaluated from the combined HE-VHE gamma-ray spectrum using NAIMA in the optically thin case. Results. The VHE gamma-ray energy spectrum is best fit by a power-law distribution with a flux normalisation of (1.34 +/- 0.14(stat) +/- 0.27(sys)) x 10(-13) cm(-2) s(-1) TeV-1 at 1 TeV - about 40% above, but compatible with the value obtained in Abramowski et al. (2012). The spectral index Gamma = 2.39 +/- 0.14(stat) +/- 0.25(sys) is slightly softer than but consistent with the previous measurement within systematic errors. In the Fermi energy range an integral flux of F(E > 60 MeV) = (1.56 +/- 0.28(stat) +/- 0.15(sys)) x 10(-8) cm(-2) s(-1) is obtained. At energies above similar to 3 GeV the HE spectrum is consistent with a power-law ranging into the VHE part of the spectrum measured by H.E.S.S. with an overall spectral index Gamma = 2.22 +/- 0.06(stat). Conclusions. Two scenarios for the starburst nucleus are tested, in which the gas in the starburst nucleus acts as either a thin or a thick target for hadronic cosmic rays accelerated by the individual sources in the nucleus. In these two models, the level to which NGC 253 acts as a calorimeter is estimated to a range of f(cal) = 0.1 to 1 while accounting for the measurement uncertainties. The presented spectrum is likely to remain the most accurate measurements until the Cherenkov Telescope Array (CTA) has collected a substantial set of data towards NGC 253.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201833202
1432-0746
wos:2018
A73
WOS:000445045400001
Volk, HJ; Yang, R (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Hoischen, C (reprint author), Univ Potsdam, Inst Phys Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.; Taylor, AM (reprint author), DESY, D-15738 Zeuthen, Germany.
2021-09-27T08:24:55+00:00
sword
importub
filename=package.tar
c2811002361fc4b9750462ccc152ca69
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true
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Dei
J. Devin
P. dewilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I Oya
M. Padovani
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowel
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
F. Spanier
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
I Sushch
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
A. Woernlein
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
astroparticle physics
eng
uncontrolled
galaxies: starburst
eng
uncontrolled
gamma rays: galaxies
Astronomie und zugeordnete Wissenschaften
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
53088
2018
2018
eng
25
612
article
EDP Sciences
Les Ulis
H E S S Collaboration
1
2018-04-09
2018-04-09
--
HESS observations of RX J1713.7-3946 with improved angular and spectral resolution
Astronomy and astrophysics : an international weekly journal
Evidence for gamma-ray emission extending beyond the X-ray emitting shell
10.1051/0004-6361/201629790
1432-0746
wos:2018
A6
WOS:000429404700006
Eger, P; Parsons, RD (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.; Berge, D (reprint author), Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands.; Berge, D (reprint author), Univ Amsterdam, Inst High Energy Phys, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands.
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish Ministry of Science and Higher EducationMinistry of Science and Higher Education, Poland; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research CouncilAustralian Research Council; National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA); Department of Energy in the United StatesUnited States Department of Commission; Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in FranceCentre National de la Recherche Scientifique (CNRS); Agenzia Spaziale ItalianaItalian Space Agency; Istituto Nazionale di Fisica Nucleare in ItalyIstituto Nazionale di Fisica Nucleare; Ministry of Education, Culture, Sports, Science and Technology (MEXT)Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); High Energy Accelerator Research Organization (KEK)High Energy Accelerator Research Organization (KEK); Japan Aerospace Exploration Agency (JAXA) in Japan; K. A. Wallenberg FoundationKnut & Alice Wallenberg Foundation; Swedish Research CouncilSwedish Research Council; Swedish National Space Board in Sweden
2021-12-10T09:34:43+00:00
sword
importub
filename=package.tar
5318d680309184e054481829ffe2e65f
false
true
Hassan E. Abdalla
A. Abramowski
Felix A. Aharonian
F. Ait Benkhali
A. G. Akhperjanian
T. Andersson
E. O. Anguener
M. Arrieta
P. Aubert
M. Backes
A. Balzer
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
T. Bulik
M. Capasso
J. Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
R. Chalme-Calvet
R. C. G. Chaves
A. Chen
J. Chevalier
M. Chretien
S. Colafrancesco
G. Cologna
B. Condon
J. Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Dei
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
T. Fukuyama
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
D. Hadasch
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
J. A. Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanie
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
I. Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Edik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
F. Volpe
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
acceleration of particles
eng
uncontrolled
cosmic rays
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
gamma rays: general
eng
uncontrolled
astroparticle physic
Physik
Institut für Physik und Astronomie
Referiert
Import
Bronze Open-Access
46274
2017
2017
eng
11
606
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of HESS blazars
Very high-energy gamma rays (VHE, E greater than or similar to 100 GeV) propagating over cosmological distances can interact with the low-energy photons of the extragalactic background light (EBL) and produce electron-positron pairs. The transparency of the Universe to VHE gamma rays is then directly related to the spectral energy distribution (SED) of the EBL. The observation of features in the VHE energy spectra of extragalactic sources allows the EBL to be measured, which otherwise is very difficult. An EBL model-independent measurement of the EBL SED with the H.E.S.S. array of Cherenkov telescopes is presented. It was obtained by extracting the EBL absorption signal from the reanalysis of high-quality spectra of blazars. From H.E.S.S. data alone the EBL signature is detected at a significance of 9.5 sigma, and the intensity of the EBL obtained in different spectral bands is presented together with the associated gamma-ray horizon.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201731200
1432-0746
wos:2017
A59
WOS:000412876700003
Abdalla, H (reprint author), Northwest Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
Namibian authorities; University of Namibia; German Ministry for Education and Research (BMBF); Max Planck Society; German Research Foundation (DFG); Alexander von Humboldt Foundation; Deutsche Forschungsgemeinschaft; French Ministry for Research; CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science Foundation; Polish National Science Centre; South African Department of Science and Technology; National Research Foundation; National Commission on Research, Science & Technology of Namibia (NCRST); Innsbruck University; Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research Council; Japan Society for the Promotion of Science; University of Amsterdam
importub
2020-04-20T00:06:01+00:00
filename=package.tar
09e04276411d7571c2c4ccf9017c6b1a
Hassan E. Abdalla
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
T. Andersson
Ekrem Oǧuzhan Anguner
M. Arakawa
M. Arrieta
Pierre Aubert
Michael Backes
Arnim Balzer
Michelle Barnard
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
R. Blackwell
Markus Böttcher
Catherine Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
M. Buechele
Tomasz Bulik
M. Capasso
John Carr
Sabrina Casanova
M. Cerruti
N. Chakraborty
Ryan C. G. Chaves
Andrew Chen
J. Chevalier
M. Coffaro
Sergio Colafrancesco
Gabriele Cologna
B. Condon
Jan Conrad
Y. Cui
I. D. Davids
J. Decock
B. Degrange
C. Deil
J. Devin
P. de Wilt
L. Dirson
A. Djannati-Atai
W. Domainko
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
S. Richter
F. Rieger
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
D. Salek
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
K. Stycz
Iurii Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
BL Lacertae objects: general
eng
uncontrolled
cosmic background radiation
eng
uncontrolled
infrared: diffuse background
Institut für Physik und Astronomie
Referiert
Import
46148
2017
2017
eng
628
650
9
850
article
IOP Publ. Ltd.
Bristol
HESS Collaboration
1
--
--
--
TeV Gamma-Ray Observations of the Binary Neutron Star Merger GW170817 with HESS
We search for high-energy gamma-ray emission from the binary neutron star merger GW170817 with the H.E.S.S. Imaging Air Cherenkov Telescopes. The observations presented here have been obtained starting only 5.3 hr after GW170817. The H.E.S.S. target selection identified regions of high probability to find a counterpart of the gravitational-wave event. The first of these regions contained the counterpart SSS17a that has been identified in the optical range several hours after our observations. We can therefore present the first data obtained by a ground-based pointing instrument on this object. A subsequent monitoring campaign with the H.E.S.S. telescopes extended over several days, covering timescales from 0.22 to 5.2 days and energy ranges between 270 GeV to 8.55 TeV. No significant gamma-ray emission has been found. The derived upper limits on the very-high-energy gamma-ray flux for the first time constrain non-thermal, high-energy emission following the merger of a confirmed binary neutron star system.
The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters
10.3847/2041-8213/aa97d2
2041-8205
2041-8213
wos:2017
L22
WOS:000416034400002
Fussling, M (reprint author), DESY, D-15738 Zeuthen, Germany., contact.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF); Max Planck Society; German Research Foundation (DFG); French Ministry for Research; CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; U.K. Science and Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science Foundation; Polish Ministry of Science and Higher Education; South African Department of Science and Technology; National Research Foundation; University of Namibia; Innsbruck University; Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; University of Adelaide; Australian Research Council
importub
2020-04-19T23:03:01+00:00
filename=package.tar
a693a0894944dd96ed3392609717ae47
Hassan E. Abdalla
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
Ekrem Oǧuzhan Anguner
M. Arakawa
M. Arrieta
Pierre Aubert
Michael Backes
Arnim Balzer
Michelle Barnard
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
R. Blackwell
Markus Böttcher
Catherine Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
M. Buechele
Tomasz Bulik
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
Ryan C. G. Chaves
Andrew Chen
J. Chevalier
Sergio Colafrancesco
B. Condon
Jan Conrad
I. D. Davids
J. Decock
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Donath
K. Dutson
J. Dyks
T. Edwards
Kathrin Egberts
G. Emery
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
T. Garrigoux
F. Gate
G. Giavitto
B. Giebels
D. Glawion
J. F. Glicenstein
D. Gottschall
M. -H. Grondin
J. Hahn
M. Haupt
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
A. Ivascenko
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
M. Jingo
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
D. Klochkov
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruer
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Liu
R. Lopez-Coto
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
K. Mora
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
H. Sol
F. Spanier
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
Iurii Sushch
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
gamma-ray burst: individual (GRB 170817A)
eng
uncontrolled
gamma rays: general
eng
uncontrolled
gravitational waves
Institut für Physik und Astronomie
Referiert
Import
44856
2016
2016
eng
7
117
article
American Physical Society
College Park
HESS Collaboration
1
--
--
--
HESS Limits on Linelike Dark Matter Signatures in the 100 GeV to 2 TeV Energy Range Close to the Galactic Center
A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data extend the energy coverage of the previous measurement down to 100 GeV. The 18 h of data collected with the H.E.S.S. array allow one to rule out at 95% C.L. the presence of a 130 GeV line (at l = -1.5 degrees, b = 0 degrees and for a dark matter profile centered at this location) previously reported in Fermi-LAT data. This new analysis overlaps significantly in energy with previous Fermi-LAT and H.E.S.S. results. No significant excess associated with dark matter annihilations was found in the energy range of 100 GeV to 2 TeV and upper limits on the gamma-ray flux and the velocity weighted annihilation cross section are derived adopting an Einasto dark matter halo profile. Expected limits for present and future large statistics H.E.S.S. observations are also given.
Physical review letters
10.1103/PhysRevLett.117.151302
27768338
0031-9007
1079-7114
wos2016:2019
151302
WOS:000385341900005
Mora, K (reprint author), Stockholm Univ, Albanova Univ Ctr, Oskar Klein Ctr, Dept Phys, SE-10691 Stockholm, Sweden., contact.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF); Max Planck Society; German Research Foundation (DFG); French Ministry for Research; Centre National de la Recherche Scientifique-Institut National de Physique Nucleaire et de Physique des Particules; Astroparticle Interdisciplinary Programme of the Centre National de la Recherche Scientifique; United Kingdom Science and Technology Facilities Council (STFC); Institute of Particle and Nuclear Physics of the Charles University; Czech Science Foundation; Polish Ministry of Science and Higher Education; South African Department of Science and Technology; National Research Foundation; University of Namibia; European Union [PIEF-GA-2012-332350]
importub
2020-03-22T13:40:01+00:00
filename=package.tar
61fe65fdd5067852c6c8f76001d04e78
Hassan E. Abdalla
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
T. Andersson
Ekrem Oǧuzhan Angüner
M. Arrieta
Pierre Aubert
Michael Backes
Arnim Balzer
Michelle Barnard
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
R. Blackwell
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
M. Capasso
John Carr
Sabrina Casanova
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
Andrew Chen
J. Chevalier
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
B. Condon
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
J. Devin
P. de Wilt
A. Djannati-Ataie
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
S. Eschbach
C. Farnier
S. Fegan
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
S. Funk
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
M. Grudzinska
D. Hadasch
J. Hahn
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
D. Jankowsky
F. Jankowsky
M. Jingo
T. Jogler
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
J. King
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. -P. Lees
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
R. Liu
T. Lohse
M. Lorentz
I. Lypova
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
Michael Mayer
P. J. Meintjes
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
S. Oettl
I. Oya
M. Padovani
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
C. Perennes
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
M. Settimo
A. S. Seyffert
N. Shafi
I. Shilon
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
M. Tluczykont
C. Trichard
R. Tuffs
J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
P. Wagner
R. M. Wagner
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
N. Zywucka
Institut für Physik und Astronomie
Referiert
Import
38944
2015
2015
eng
6
577
article
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
Discovery of variable VHE gamma-ray emission from the binary system 1FGL J1018.6-5856
Re-observations with the HESS telescope array of the very high-energy (VHE) source HESS J1018-589A that is coincident with the Fermi-LAT gamma-ray binary 1FGL J1018.6-5856 have resulted in a source detection significance of more than 9 sigma and the detection of variability (chi(2)/nu of 238.3/155) in the emitted gamma-ray flux. This variability confirms the association of HESS J1018-589A with the high-energy gamma-ray binary detected Fermi-LAT and also confirms the point-like source as a new VHE binary system. The spectrum of HESS J1018-589A is best fit with a power-law function with photon index Gamma = 2.20 +/- 0.14(stat) +/- 0.2(sys). Emission is detected up to similar to 20 TeV. The mean differential flux level is (2.9 +/- 0.4) x 10(-13) TeV-1 cm(-2) s(-1) at 1 TeV, equivalent to similar to 1% of the flux from the Crab Nebula at the same energy. Variability is clearly detected the night-by-night light curve. When folded on the orbital period of 16.58 days, the rebinned light curve peaks in phase with the observed X-ray high-energy phaseograms. The fit of the HESS phaseogram to a constant flux provides evidence of periodicity at the level of N-sigma > 3 sigma. The of the VHE phaseogram and measured spectrum suggest a low-inclination, low-eccentricity system with a modest impact from VHE gamma-ray due to pair production (tau less than or similar to 1 at 300 GeV).
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201525699
0004-6361
1432-0746
wos:2015
A131
WOS:000357345900083
Wilhelmi, ED (reprint author), CSIC, Inst Ciencies Espai IEEC, Fac Ciencies, Campus UAB,Torre C5,Parell,2a Planta, Barcelona 08193, Spain., emma@mpi-hd.mpg.de; yictor.zabalza@le.ac.uk
German Ministry for Education and Research (BMBF); Max Planck Society,
the Max Planck Society, the German Research Foundation (DFG); German
Research Foundation (DFG); French Ministry for Research; CNRS-IN2P3;
Astroparticle Interdisciplinary Programme of the CNRS; UK Science and
Technology Facilities Council (STFC); IPNP of the Charles University;
Czech Science Foundation; Polish Ministry of Science and Higher
Education; South African Department of Science and Technology; National
Research Foundation; University of Namibia
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Arnim Balzer
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
R. Blackwell
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
John Carr
Sabrina Casanova
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
Andrew Chen
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ataï
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
J. -P. Ernenwein
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandesl
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M. -H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
C. Jahn
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieckl
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
T. Lohse
A. Lopatin
C. -C. Lu
R. Lui
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
H. Poon
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
A. S. Seyffert
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
N. Zywucka
eng
uncontrolled
gamma rays: stars
eng
uncontrolled
stars: individual: 1FGL J1018.6-5856
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
acceleration of particles
eng
uncontrolled
X-rays: binaries
Institut für Physik und Astronomie
Referiert
45503
2016
2016
eng
476
+
14
531
article
Nature Publ. Group
London
HESS Collaboration
1
--
--
--
Acceleration of petaelectronvolt protons in the Galactic Centre
Galactic cosmic rays reach energies of at least a few petaelectronvolts (of the order of 1015 electronvolts). This implies that our Galaxy contains petaelectronvolt accelerators (‘PeVatrons’), but all proposed models of Galactic cosmic-ray accelerators encounter difficulties at exactly these energies. Dozens of Galactic accelerators capable of accelerating particles to energies of tens of teraelectronvolts (of the order of 1013 electronvolts) were inferred from recent γ-ray observations3. However, none of the currently known accelerators—not even the handful of shell-type supernova remnants commonly believed to supply most Galactic cosmic rays—has shown the characteristic tracers of petaelectronvolt particles, namely, power-law spectra of γ-rays extending without a cut-off or a spectral break to tens of teraelectronvolts4. Here we report deep γ-ray observations with arcminute angular resolution of the region surrounding the Galactic Centre, which show the expected tracer of the presence of petaelectronvolt protons within the central 10 parsecs of the Galaxy. We propose that the supermassive black hole Sagittarius A* is linked to this PeVatron. Sagittarius A* went through active phases in the past, as demonstrated by X-ray outbursts5and an outflow from the Galactic Centre6. Although its current rate of particle acceleration is not sufficient to provide a substantial contribution to Galactic cosmic rays, Sagittarius A* could have plausibly been more active over the last 106–107 years, and therefore should be considered as a viable alternative to supernova remnants as a source of petaelectronvolt Galactic cosmic rays.
Nature : the international weekly journal of science
10.1038/nature17147
0028-0836
1476-4687
wos2016:2019
WOS:000372701300034
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., contact.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF); Max Planck Society; German Research Foundation (DFG); French Ministry for Research; CNRS-IN2P3; Astroparticle Interdisciplinary Programme of the CNRS; UK Science and Technology Facilities Council (STFC); IPNP of the Charles University; Czech Science Foundation; Polish Ministry of Science and Higher Education; South African Department of Science and Technology; National Research Foundation; University of Namibia; EU FP7 Marie Curie grant [PIEF-GA-2012-332350]
importub
2020-03-22T19:05:02+00:00
filename=package.tar
b0ac94c2ed658dad86e5fd5cb79fb41c
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Arnim Balzer
Yvonne Becherini
J. Becker Tjus
David Berge
Sabrina Bernhard
K. Bernlöhr
E. Birsin
R. Blackwell
Markus Boettcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
John Carr
Sabrina Casanova
N. Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
Andrew Chen
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
Y. Cui
I. D. Davids
B. Degrange
C. Deil
P. deWilt
A. Djannati-Ata
W. Domainko
A. Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
T. Edwards
Kathrin Egberts
P. Eger
J-P. Ernenwein
P. Espigat
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
S. Gabici
M. Gajdus
Y. A. Gallant
T. Garrigoux
G. Giavitto
B. Giebels
J. F. Glicenstein
D. Gottschall
A. Goyal
M-H. Grondin
M. Grudzinska
D. Hadasch
S. Haeffner
J. Hahn
J. Hawkes
G. Heinzelmann
G. Henri
G. Hermann
O. Hervet
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
Clemens Hoischen
M. Holler
D. Horns
A. Ivascenko
A. Jacholkowska
M. Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
M. A. Kastendieck
K. Katarzynski
U. Katz
D. Kerszberg
B. Khelifi
M. Kieffer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lau
J. Lefaucheur
V. Lefranc
A. Lemiere
M. Lemoine-Goumard
J-P. Lenain
T. Lohse
A. Lopatin
C-C. Lu
R. Lui
V. Marandon
A. Marcowith
C. Mariaud
R. Marx
G. Maurin
N. Maxted
M. Mayer
P. J. Meintjes
U. Menzler
M. Meyer
A. M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
E. Moulin
T. Murach
M. de Naurois
J. Niemiec
L. Oakes
H. Odaka
S. Oettl
S. Ohm
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
P-O. Petrucci
B. Peyaud
S. Pita
H. Poon
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
D. Salek
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schuessler
A. Schulz
U. Schwanke
S. Schwemmer
A. S. Seyffert
R. Simoni
H. Sol
F. Spanier
G. Spengler
F. Spies
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J-P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
M. Tluczykont
C. Trichard
R. Tuffs
K. Valerius
J. van der Walt
C. van Eldik
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
M. Weidinger
Q. Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
F. Zefi
N. Zywucka
Institut für Physik und Astronomie
Referiert
Import
51271
2018
2018
eng
22
11
article
IOP Publishing Ltd. (Bristol)
Bristol
HESS Collaboration
1
2018-11-23
2018-11-23
--
Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.
Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about <sigma upsilon > less than or similar to 3 x 10(-25) cm(3) s(-1) are obtained in the mass range of 400 GeV to 1TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.
Journal of cosmology and astroparticle physics
10.1088/1475-7516/2018/11/037
1475-7516
wos:2018
037
WOS:000451080800001
Panci, P (reprint author), CERN, Theoret Phys Dept, Geneva, Switzerland.
2021-07-12T07:51:33+00:00
sword
importub
filename=package.tar
01034219a979067b647171ae401f640b
false
true
Hassan E. Abdalla
Felix A. Aharonian
Faical Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
Michael Backes
M. Barnard
Yvonne Becherini
J. Becker Tjus
D. Berge
S. Bernhard
Konrad Bernlöhr
R. Blackwell
Markus Böttcher
C. Boisson
Julien Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Büchele
Tomasz Bulik
Tomas Bylund
Massimo Capasso
S. Caroff
A. Carosi
Sabrina Casanova
Matteo Cerruti
Nachiketa Chakraborty
S. Chandra
R. C. G. Chaves
A. Chen
Sergio Colafrancesco
B. Condon
Isak Davids
Christoph Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
Axel Donath
Victor Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J. -P. Ernenwein
Stefan Eschbach
S. Fegan
Armand Fiasson
G. Fontaine
Sebastian Funk
Matthias Füßling
S. Gabici
Y. A. Gallant
F. Gate
Gianluca Giavitto
Dorit Eisenacher Glawion
Jean-François Glicenstein
D. Gottschall
Marie-Hélène Grondin
J. Hahn
M. Haupt
G. Heinzelmann
Gilles Henri
G. Hermann
James Anthony Hinton
Werner Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
David Jankowsky
Felix Jankowsky
L. Jouvin
I. Jung-Richardt
M. A. Kastendieck
Krzysztof Katarzyński
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu. Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Lopez-Coto
I. Lypova
D. Malyshev
V. Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I. Oya
M. Padovani
M. Panter
R. D. Parsons
C. Perennes
P. -O. Petrucci
B. Peyaud
Q. Piel
S. Pita
V. Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V. Sahakian
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I. Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
F. Spanier
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
A. Viana
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. M. Wagner
R. White
A. Wierzcholska
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
M. Cirelli
P. Panci
F. Sala
J. Silk
M. Taoso
eng
uncontrolled
dark matter detectors
eng
uncontrolled
dark matter experiments
eng
uncontrolled
dwarfs galaxies
eng
uncontrolled
gamma ray detectors
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
35105
2013
2013
eng
14
4
552
article
EDP SCIENCES S A
LES ULIS CEDEX A
HESS Collaboration
1
--
--
--
Discovery of TeV gamma-ray emission from PKS 0447-439 and derivation of
an upper limit on its redshift
Very high-energy gamma-ray emission from PKS 0447-439 was detected with the H. E. S. S. Cherenkov telescope array in December 2009. This blazar is one of the brightest extragalactic objects in the Fermi bright source list and has a hard spectrum in the MeV to GeV range. In the TeV range, a photon index of 3.89 +/- 0.37 (stat) +/- 0.22 (sys) and a flux normalisation at 1 TeV, phi(1) (TeV) = (3.5 +/- 1.1(stat) +/- 0.9(sys)) x 10(-13) cm(-2) s(-1) TeV-1 were found. The detection with H. E. S. S. triggered observations in the X-ray band with the Swift and RXTE telescopes. Simultaneous UV and optical data from Swift UVOT and data from the optical telescopes ATOM and ROTSE are also available. The spectrum and light curve measured with H. E. S. S. are presented and compared to the multi-wavelength data at lower energies. A rapid flare is seen in the Swift XRT and RXTE data, together with a flux variation in the UV band, at a time scale of the order of one day. A firm upper limit of z < 0.59 on the redshift of PKS 0447-439 is derived from the combined Fermi-LAT and H. E. S. S. data, given the assumptions that there is no upturn in the intrinsic spectrum above the Fermi-LAT energy range and that absorption on the extragalactic background light (EBL) is not weaker than the lower limit provided by current models. The spectral energy distribution is well described by a simple one-zone synchrotron self-Compton scenario, if the redshift of the source is less than z less than or similar to 0.4.
ASTRONOMY & ASTROPHYSICS
10.1051/0004-6361/201321108
0004-6361
wos:2011-2013
A118
WOS:000317912000117
Zech, A (reprint author), Univ Paris Diderot, CNRS, Observ Paris, LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France.
, Bagmeet.Behera@desy.de; Andreas.Zech@obspm.fr
Attila Abramowski
F. Acero
A. G. Akhperjanian
Gisela Anton
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
J. Becker Tjus
B. Behera
K. Bernlöhr
E. Birsin
Jonathan Biteau
A. Bochow
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
Ryan C. G. Chaves
A. Cheesebrough
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
C. Couturier
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
P. deWilt
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O&rsquo Drury
C.
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Kathrin Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Foerster
Matthias Fussling
M. Gajdus
Y. A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J. F. Glicenstein
B. Glueck
D. Goering
M. -H. Grondin
M. Grudzinska
S. Haeffner
J. D. Hague
J. Hahn
D. Hampf
J. Harris
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
A. Hillert
James Anthony Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
S. Klepser
D. Klochkov
W. Kluzniak
T. Kneiske
D. Kolitzus
Nu Komin
K. Kosack
R. Kossakowski
F. Krayzel
P. P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
M. Lemoine-Goumard
J. -P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
J. Masbou
G. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
U. Menzler
R. Moderski
M. Mohamed
E. Moulin
C. L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
N. Nguyen
J. Niemiec
S. J. Nolan
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
R. D. Parsons
M. Paz Arribas
N. W. Pekeur
G. Pelletier
J. Perez
P. -O. Petrucci
B. Peyaud
S. Pita
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J. L. Skilton
H. Sol
G. Spengler
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
C. Trichard
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
S. Vorobiov
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
D. Wouters
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
D. Pelat
eng
uncontrolled
galaxies: active
eng
uncontrolled
BL Lacertae objects: individual: PKS 0447-439
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
gamma rays: galaxies
50973
2019
2019
eng
464
+
12
7783
575
article
Nature Publ. Group
London
1
--
2019-11-20
--
A very-high-energy component deep in the gamma-ray burst afterglow
Gamma-ray bursts (GRBs) are brief flashes of gamma-rays and are considered to be the most energetic explosive phenomena in the Universe(1). The emission from GRBs comprises a short (typically tens of seconds) and bright prompt emission, followed by a much longer afterglow phase. During the afterglow phase, the shocked outflow-produced by the interaction between the ejected matter and the circumburst medium-slows down, and a gradual decrease in brightness is observed(2). GRBs typically emit most of their energy via.-rays with energies in the kiloelectronvolt-to-megaelectronvolt range, but a few photons with energies of tens of gigaelectronvolts have been detected by space-based instruments(3). However, the origins of such high-energy (above one gigaelectronvolt) photons and the presence of very-high-energy (more than 100 gigaelectronvolts) emission have remained elusive(4). Here we report observations of very-high-energy emission in the bright GRB 180720B deep in the GRB afterglow-ten hours after the end of the prompt emission phase, when the X-ray flux had already decayed by four orders of magnitude. Two possible explanations exist for the observed radiation: inverse Compton emission and synchrotron emission of ultrarelativistic electrons. Our observations show that the energy fluxes in the X-ray and gamma-ray range and their photon indices remain comparable to each other throughout the afterglow. This discovery places distinct constraints on the GRB environment for both emission mechanisms, with the inverse Compton explanation alleviating the particle energy requirements for the emission observed at late times. The late timing of this detection has consequences for the future observations of GRBs at the highest energies.
Nature : the international weekly journal of science
10.1038/s41586-019-1743-9
31748724
0028-0836
1476-4687
wos:2019
WOS:000498812200044
Ruiz-Velasco, E (reprint author), Max Planck Inst Kernphys, Heidelberg, Germany., contact.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation; Centre national de la recherche scientifiqueCentre National de la Recherche Scientifique (CNRS) [CNRS/IN2P3]; (CNRS/INSU)Centre National de la energies alternatives (CEA)French Atomic Energy Commission; UK Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam; EGI Federation; LAT development; US Department of Energy (DOE)United States Department of Energy (DOE); ASIItalian Space Agency; INFN (Italy), MEXT; K. A. Wallenberg FoundationKnut & Alice Wallenberg Foundation; Swedish Research CouncilSwedish Research Council; National Space Board (Sweden); INAF (Italy)Istituto Nazionale Astrofisica; CNES (France)Centre National [DE-AC02-76SF00515]
2021-06-15T12:39:11+00:00
sword
importub
filename=package.tar
1bad8215920f52ff70ec83407ce3d200
Ruiz-Velasco, E.
false
true
Hassan E. Abdalla
R. Adam
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
H. Ashkar
M. Backes
V. Barbosa Martins
M. Barnard
Y. Becherini
D. Berge
K. Bernloehr
E. Bissaldi
R. Blackwell
M. Boettcher
C. Boisson
J. Bolmont
S. Bonnefoy
J. Bregeon
M. Breuhaus
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
T. Chand
S. Chandra
A. Chen
S. Colafrancesco
M. Curylo
I. D. Davids
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
K. Feijen
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
Matthias Fussling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
L. Giunti
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
J. A. Hinton
W. Hofmann
Clemens Hoischen
T. L. Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
M. Jamrozy
D. Jankowsky
F. Jankowsky
A. Jardin-Blicq
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
D. Kostunin
M. Kreter
G. Lamanna
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
C. Levy
T. Lohse
I Lypova
J. Mackey
J. Majumdar
D. Malyshev
V Marandon
A. Marcowith
A. Mares
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
C. Moore
E. Moulin
J. Muller
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
M. Ostrowski
I Oya
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
Q. Remy
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Sailer
S. Saito
D. A. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
H. M. Schutte
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
T. Tavernier
A. M. Taylor
R. Terrier
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. White
A. Wierzcholska
R. Yang
H. Yoneda
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
A. Ziegler
J. Zorn
N. Zywucka
F. de Palma
M. Axelsson
O. J. Roberts
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
48817
2019
2019
eng
16
627
article
EDP Sciences
Les Ulis
HESS Collaboration
1
2019-07-08
2019-05-17
--
H.E.S.S. and Suzaku observations of the Vela X pulsar wind nebula
Context. Pulsar wind nebulae (PWNe) represent the most prominent population of Galactic very-high-energy gamma-ray sources and are thought to be an efficient source of leptonic cosmic rays. Vela X is a nearby middle-aged PWN, which shows bright X-ray and TeV gamma-ray emission towards an elongated structure called the cocoon. Aims. Since TeV emission is likely inverse-Compton emission of electrons, predominantly from interactions with the cosmic microwave background, while X-ray emission is synchrotron radiation of the same electrons, we aim to derive the properties of the relativistic particles and of magnetic fields with minimal modelling. Methods. We used data from the Suzaku XIS to derive the spectra from three compact regions in Vela X covering distances from 0.3 to 4 pc from the pulsar along the cocoon. We obtained gamma-ray spectra of the same regions from H.E.S.S. observations and fitted a radiative model to the multi-wavelength spectra. Results. The TeV electron spectra and magnetic field strengths are consistent within the uncertainties for the three regions, with energy densities of the order 10(-12) erg cm(-3). The data indicate the presence of a cutoff in the electron spectrum at energies of similar to 100 TeV and a magnetic field strength of similar to 6 mu G. Constraints on the presence of turbulent magnetic fields are weak. Conclusions. The pressure of TeV electrons and magnetic fields in the cocoon is dynamically negligible, requiring the presence of another dominant pressure component to balance the pulsar wind at the termination shock. Sub-TeV electrons cannot completely account for the missing pressure, which may be provided either by relativistic ions or from mixing of the ejecta with the pulsar wind. The electron spectra are consistent with expectations from transport scenarios dominated either by advection via the reverse shock or by diffusion, but for the latter the role of radiative losses near the termination shock needs to be further investigated in the light of the measured cutoff energies. Constraints on turbulent magnetic fields and the shape of the electron cutoff can be improved by spectral measurements in the energy range greater than or similar to 10 keV.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201935458
1432-0746
wos:2019
A100
WOS:000474334300001
Abdalla, H (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa., luigi.tibaldo@irap.omp.eu
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck Society; German Research Foundation (DFG)German Research Foundation (DFG); Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG); French Ministry for ResearchMinistry of Research, France; CNRS-IN2P3Centre National de la Recherche Scientifique (CNRS); Astroparticle Interdisciplinary Programme of the CNRS; IPNP of the Charles University; Czech Science FoundationGrant Agency of the Czech Republic; Polish National Science Centre; South African Department of Science and Technology and National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Austrian Science Fund (FWF)Austrian Science Fund (FWF); Austrian Federal Ministry for Science, Research and Economy; Australian Research CouncilAustralian Research Council; University of Amsterdam; EGI Federation; U. K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Innsbruck University; University of Adelaide; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; Namibian authorities
2021-01-07T13:54:47+00:00
sword
importub
filename=package.tar
c8ad68afa1f0334b88f725827f8482e5
false
true
CC-BY - Namensnennung 4.0 International
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Backes
M. Barnard
Y. Becherini
D. Berge
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
Sabrina Casanova
M. Cerruti
N. Chakraborty
T. Chand
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
K. Feijen
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
D. Kostunin
M. Kraus
G. Lamanna
J. Lau
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
T. Lohse
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
N. Maxted
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
C. Moore
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
E. de Ona Wilhelmi
M. Ostrowski
I Oya
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. A. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
H. Schutte
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
Luigi Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. White
A. Wierzcholska
R. Yang
H. Yoneda
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
stars: winds, outflows
eng
uncontrolled
gamma rays: stars
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
acceleration of particles
eng
uncontrolled
pulsars: individual: PSR B0833-45
Physik
Institut für Physik und Astronomie
Referiert
Import
Hybrid Open-Access
50453
2019
2019
eng
9
2
870
article
IOP Publ. Ltd.
Bristol
HESS Collaboration
1
2019-01-11
2019-01-11
--
The 2014TeV gamma-Ray Flare of Mrk 501 Seen with HESS
The blazar Mrk 501 (z = 0.034) was observed at very-high-energy (VHE, E greater than or similar to 100 GeV) gamma-ray wavelengths during a bright flare on the night of 2014 June 23-24 (MJD 56832) with the H.E.S.S. phase-II array of Cherenkov telescopes. Data taken that night by H.E.S.S. at large zenith angle reveal an exceptional number of gamma-ray photons at multi-TeV energies, with rapid flux variability and an energy coverage extending significantly up to 20 TeV. This data set is used to constrain Lorentz invariance violation (LIV) using two independent channels: a temporal approach considers the possibility of an energy dependence in the arrival time of gamma-rays, whereas a spectral approach considers the possibility of modifications to the interaction of VHE gamma-rays with extragalactic background light (EBL) photons. The non-detection of energy-dependent time delays and the non-observation of deviations between the measured spectrum and that of a supposed power-law intrinsic spectrum with standard EBL attenuation are used independently to derive strong constraints on the energy scale of LIV (E-QG) in the subluminal scenario for linear and quadratic perturbations in the dispersion relation of photons. For the case of linear perturbations, the 95% confidence level limits obtained are E-QG,E-1 > 3.6 x 10(17) GeV using the temporal approach and E-QG,E-1 > 2.6 x 10(19) GeV using the spectral approach. For the case of quadratic perturbations, the limits obtained are E-QG,E-2 > 8.5 x 10(10) GeV using the temporal approach and E-QG,E-2 > 7.8 x 10(11) GeV using the spectral approach.
The astrophysical journal : an international review of spectroscopy and astronomical physics
Temporal and Spectral Constraints on Lorentz Invariance Violation
10.3847/1538-4357/aaf1c4
0004-637X
1538-4357
wos:2019
93
WOS:000455820100039
Chakraborty, N (reprint author), Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany., contact.hess@hess-experiment.eu
German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation; Centre National de la Recherche Scientifique (CNRS/IN2P3); Centre National de la Recherche Scientifique (CNRS/INSU)Centre National de la Recherche alternatives (CEA)French Atomic Energy Commission; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; South African Department of Science and Technology; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science; University of Amsterdam
2021-04-21T08:12:49+00:00
sword
importub
filename=package.tar
6c2ea569fa0afd3ffa0856af7a9abc55
Chakraborty, Nachiketa
false
true
Hassan E. Abdalla
Felix A. Aharonian
F. Ait Benkhali
Ekrem Oǧuzhan Angüner
M. Arakawa
C. Arcaro
C. Armand
M. Arrieta
M. Backes
M. Barnard
Y. Becherini
J. Becker Tjus
D. Berge
S. Bernhard
K. Bernloehr
R. Blackwell
M. Bottcher
C. Boisson
J. Bolmont
S. Bonnefoy
Pol Bordas
J. Bregeon
F. Brun
P. Brun
M. Bryan
M. Buechele
T. Bulik
T. Bylund
M. Capasso
S. Caroff
A. Carosi
M. Cerruti
N. Chakraborty
S. Chandra
R. C. G. Chaves
A. Chen
S. Colafrancesco
B. Condon
I. D. Davids
C. Deil
J. Devin
P. deWilt
L. Dirson
A. Djannati-Atai
A. Dmytriiev
A. Donath
V Doroshenko
J. Dyks
Kathrin Egberts
G. Emery
J-P Ernenwein
S. Eschbach
S. Fegan
A. Fiasson
G. Fontaine
S. Funk
M. Fuessling
S. Gabici
Y. A. Gallant
F. Gate
G. Giavitto
D. Glawion
J. F. Glicenstein
D. Gottschall
M-H Grondin
J. Hahn
M. Haupt
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
W. Hofmann
Clemens Hoischen
Tim Lukas Holch
M. Holler
D. Horns
D. Huber
H. Iwasaki
A. Jacholkowska
M. Jamrozy
D. Jankowsky
F. Jankowsky
L. Jouvin
I Jung-Richardt
M. A. Kastendieck
K. Katarzynski
M. Katsuragawa
U. Katz
D. Kerszberg
D. Khangulyan
B. Khelifi
J. King
S. Klepser
W. Kluzniak
Nu Komin
K. Kosack
S. Krakau
M. Kraus
P. P. Kruger
G. Lamanna
J. Lau
J. Lefaucheur
A. Lemiere
M. Lemoine-Goumard
J-P Lenain
Eva Leser
T. Lohse
M. Lorentz
R. Lopez-Coto
I Lypova
D. Malyshev
V Marandon
A. Marcowith
C. Mariaud
G. Marti-Devesa
R. Marx
G. Maurin
P. J. Meintjes
A. M. W. Mitchell
R. Moderski
M. Mohamed
L. Mohrmann
E. Moulin
T. Murach
S. Nakashima
M. de Naurois
H. Ndiyavala
F. Niederwanger
J. Niemiec
L. Oakes
H. Odaka
S. Ohm
M. Ostrowski
I Oya
M. Padovani
M. Panter
R. D. Parsons
C. Perennes
P-O Petrucci
B. Peyaud
Q. Piel
S. Pita
V Poireau
A. Priyana Noel
D. Prokhorov
H. Prokoph
G. Puehlhofer
M. Punch
A. Quirrenbach
S. Raab
R. Rauth
A. Reimer
O. Reimer
M. Renaud
F. Rieger
L. Rinchiuso
C. Romoli
G. Rowell
B. Rudak
E. Ruiz-Velasco
V Sahakian
S. Saito
David M. Sanchez
A. Santangelo
M. Sasaki
R. Schlickeiser
F. Schussler
A. Schulz
U. Schwanke
S. Schwemmer
M. Seglar-Arroyo
M. Senniappan
A. S. Seyffert
N. Shafi
I Shilon
K. Shiningayamwe
R. Simoni
A. Sinha
H. Sol
F. Spanier
A. Specovius
M. Spir-Jacob
L. Stawarz
R. Steenkamp
Christian Stegmann
Constantin Beverly Steppa
T. Takahashi
J-P Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
L. Tibaldo
D. Tiziani
M. Tluczykont
C. Trichard
M. Tsirou
N. Tsuji
R. Tuffs
Y. Uchiyama
D. J. van der Walt
C. van Eldik
C. van Rensburg
B. van Soelen
G. Vasileiadis
J. Veh
C. Venter
P. Vincent
J. Vink
F. Voisin
H. J. Voelk
T. Vuillaume
Z. Wadiasingh
S. J. Wagner
R. M. Wagner
R. White
A. Wierzcholska
R. Yang
D. Zaborov
M. Zacharias
R. Zanin
A. A. Zdziarski
Alraune Zech
F. Zefi
A. Ziegler
J. Zorn
N. Zywucka
eng
uncontrolled
astroparticle physics
eng
uncontrolled
BL Lacertae objects: individual (Mrk 501)
eng
uncontrolled
gamma rays: galaxies
Astronomie und zugeordnete Wissenschaften
Physik
Institut für Physik und Astronomie
Referiert
Import
Green Open-Access
36122
2012
2012
eng
18
2
746
article
IOP Publ. Ltd.
Bristol
HESS Collaboration, MAGIC Collaboration, VERITAS Collaboration
1
--
--
--
The 2010 very high energy gamma-ray flare and 10 years ofmulti-wavelength oservations of M 87
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3-6) x 10(9) M-circle dot) provides a unique opportunity to investigate the origin of very high energy (VHE; E > 100 GeV) gamma-ray emission generated in relativistic outflows and the surroundings of supermassive black holes. M 87 has been established as a VHE gamma-ray emitter since 2006. The VHE gamma-ray emission displays strong variability on timescales as short as a day. In this paper, results from a joint VHE monitoring campaign on M 87 by the MAGIC and VERITAS instruments in 2010 are reported. During the campaign, a flare at VHE was detected triggering further observations at VHE (H.E.S.S.), X-rays (Chandra), and radio (43 GHz Very Long Baseline Array, VLBA). The excellent sampling of the VHE gamma-ray light curve enables one to derive a precise temporal characterization of the flare: the single, isolated flare is well described by a two-sided exponential function with significantly different flux rise and decay times of tau(rise)(d) = (1.69 +/- 0.30) days and tau(decay)(d) = (0.611 +/- 0.080) days, respectively. While the overall variability pattern of the 2010 flare appears somewhat different from that of previous VHE flares in 2005 and 2008, they share very similar timescales (similar to day), peak fluxes (Phi(>0.35 TeV) similar or equal to (1-3) x 10(-11) photons cm(-2) s(-1)), and VHE spectra. VLBA radio observations of 43 GHz of the inner jet regions indicate no enhanced flux in 2010 in contrast to observations in 2008, where an increase of the radio flux of the innermost core regions coincided with a VHE flare. On the other hand, Chandra X-ray observations taken similar to 3 days after the peak of the VHE gamma-ray emission reveal an enhanced flux from the core (flux increased by factor similar to 2; variability timescale <2 days). The long-term (2001-2010) multi-wavelength (MWL) light curve of M 87, spanning from radio to VHE and including data from Hubble Space Telescope, Liverpool Telescope, Very Large Array, and European VLBI Network, is used to further investigate the origin of the VHE gamma-ray emission. No unique, common MWL signature of the three VHE flares has been identified. In the outer kiloparsec jet region, in particular in HST-1, no enhanced MWL activity was detected in 2008 and 2010, disfavoring it as the origin of the VHE flares during these years. Shortly after two of the three flares (2008 and 2010), the X-ray core was observed to be at a higher flux level than its characteristic range (determined from more than 60 monitoring observations: 2002-2009). In 2005, the strong flux dominance of HST-1 could have suppressed the detection of such a feature. Published models for VHE gamma-ray emission from M 87 are reviewed in the light of the new data.
The astrophysical journal : an international review of spectroscopy and astronomical physics
10.1088/0004-637X/746/2/151
0004-637X
wos:2011-2013
151
WOS:000300406300037
Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany., martin.raue@desy.de; stawarz@astro.isas.jaxa.jp; colin@mppmu.mpg.de; mazin@ifae.es; beilicke@physics.wustl.edu; cmhui@physics.utah.edu
Namibian authorities; German Ministry for Education and Research (BMBF);
Max Planck Society; French Ministry for Research; CNRS-IN2P3; CNRS; U.K.
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Polish Ministry of Science and Higher Education; South
African Department of Science and Technology; National Research
Foundation; University of Namibia; German BMBF; German MPG; Italian
INFN; Swiss National Fund SNF; Spanish MICINN; Bulgarian NSF
[CSD2007-00042, CSD2009-00064, DO02-353]; Academy of Finland [127740];
YIP of the Helmholtz Gemeinschaft; DFG Cluster of Excellence "Origin and
Structure of the Universe,"; DFG Collaborative Research Centers
[SFB823/C4, SFB876/C3]; Polish MNiSzW [745/N-HESS-MAGIC/2010/0]; US
Department of Energy Office of Science; US National Science Foundation;
Smithsonian Institution; NSERC in Canada; Science Foundation Ireland
(SFI) [10/RFP/AST2748]; STFC in the UK; Istituto Nazionale di
Astrofisica in Italy; Centre National d'Etudes Spatiales in France; NASA
[GO0-11120X]; Associated Universities, Inc.; European Community [227290]
Attila Abramowski
F. Acero
Felix A. Aharonian
A. G. Akhperjanian
Gisela Anton
Arnim Balzer
Anna Barnacka
U. Barres de Almeida
Yvonne Becherini
J. Becker
B. Behera
K. Bernlöhr
E. Birsin
Jonathan Biteau
A. Bochow
Catherine Boisson
J. Bolmont
Pol Bordas
J. Brucker
Francois Brun
Pierre Brun
Tomasz Bulik
I. Buesching
Svenja Carrigan
Sabrina Casanova
M. Cerruti
Paula M. Chadwick
A. Charbonnier
Ryan C. G. Chaves
A. Cheesebrough
A. C. Clapson
G. Coignet
Gabriele Cologna
Jan Conrad
M. Dalton
M. K. Daniel
I. D. Davids
B. Degrange
C. Deil
H. J. Dickinson
A. Djannati-Ataï
W. Domainko
L. O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Kathrin Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M. V. Fernandes
A. Fiasson
G. Fontaine
A. Foerster
M. Fuessling
Y. A. Gallant
H. Gast
L. Gerard
D. Gerbig
B. Giebels
J. F. Glicenstein
B. Glueck
P. Goret
D. Goering
S. Haeffner
J. D. Hague
D. Hampf
M. Hauser
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
James Anthony Hinton
A. Hoffmann
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
O. C. de Jager
C. Jahn
M. Jamrozy
I. Jung
M. A. Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
D. Keogh
D. Khangulyan
B. Khelifi
D. Klochkov
W. Kluzniak
T. Kneiske
Nu. Komin
K. Kosack
R. Kossakowski
H. Laffon
G. Lamanna
D. Lennarz
T. Lohse
A. Lopatin
C. -C. Lu
V. Marandon
A. Marcowith
J. Masbou
D. Maurin
N. Maxted
M. Mayer
T. J. L. McComb
M. C. Medina
J. Mehault
R. Moderski
E. Moulin
C. L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
D. Nekrassov
N. Nguyen
B. Nicholas
J. Niemiec
S. J. Nolan
S. Ohm
E. de Ona Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
M. Paz Arribas
G. Pedaletti
G. Pelletier
P. -O. Petrucci
S. Pita
G. Puehlhofer
M. Punch
A. Quirrenbach
M. Raue
S. M. Rayner
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
J. Ruppel
V. Sahakian
David M. Sanchez
A. Santangelo
R. Schlickeiser
F. M. Schoeck
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J. L. Skilton
H. Sol
G. Spengler
L. Stawarz
R. Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
A. Szostek
J. -P. Tavernet
R. Terrier
M. Tluczykont
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
J. P. Vialle
A. Viana
P. Vincent
H. J. Voelk
F. Volpe
S. Vorobiov
M. Vorster
S. J. Wagner
M. Ward
R. White
A. Wierzcholska
M. Zacharias
A. Zajczyk
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
J. Aleksic
L. A. Antonelli
P. Antoranz
Michael Backes
J. A. Barrio
D. Bastieri
J. Becerra Gonzalez
W. Bednarek
A. Berdyugin
K. Berger
E. Bernardini
A. Biland
O. Blanch Bigas
R. K. Bock
A. Boller
G. Bonnoli
D. Borla Tridon
I. Braun
T. Bretz
A. Canellas
E. Carmona
A. Carosi
P. Colin
E. Colombo
J. L. Contreras
J. Cortina
L. Cossio
S. Covino
F. Dazzi
A. De Angelis
E. De Cea del Pozo
B. De Lotto
C. Delgado Mendez
A. Diago Ortega
M. Doert
A. Dominguez
Dijana Dominis Prester
D. Dorner
M. Doro
D. Elsaesser
D. Ferenc
M. V. Fonseca
L. Font
C. Fruck
R. J. Garcia Lopez
M. Garczarczyk
D. Garrido
G. Giavitto
N. Godinovic
D. Hadasch
D. Haefner
A. Herrero
D. Hildebrand
D. Hoehne-Moench
J. Hose
D. Hrupec
B. Huber
T. Jogler
S. Klepser
T. Kraehenbuehl
J. Krause
A. La Barbera
D. Lelas
E. Leonardo
E. Lindfors
S. Lombardi
M. Lopez
E. Lorenz
M. Makariev
G. Maneva
N. Mankuzhiyil
K. Mannheim
L. Maraschi
M. Mariotti
M. Martinez
D. Mazin
M. Meucci
J. M. Miranda
R. Mirzoyan
H. Miyamoto
J. Moldon
A. Moralejo
P. Munar
D. Nieto
K. Nilsson
R. Orito
I. Oya
D. Paneque
R. Paoletti
S. Pardo
J. M. Paredes
S. Partini
M. Pasanen
F. Pauss
M. A. Perez-Torres
M. Persic
L. Peruzzo
M. Pilia
J. Pochon
F. Prada
P. G. Prada Moroni
E. Prandini
I. Puljak
I. Reichardt
R. Reinthal
W. Rhode
M. Ribo
J. Rico
S. Ruegamer
A. Saggion
K. Saito
T. Y. Saito
M. Salvati
K. Satalecka
V. Scalzotto
V. Scapin
C. Schultz
T. Schweizer
M. Shayduk
S. N. Shore
A. Sillanpaa
J. Sitarek
D. Sobczynska
F. Spanier
S. Spiro
A. Stamerra
B. Steinke
J. Storz
N. Strah
T. Suric
L. Takalo
H. Takami
F. Tavecchio
P. Temnikov
T. Terzic
D. Tescaro
M. Teshima
M. Thom
O. Tibolla
D. F. Torres
A. Treves
H. Vankov
P. Vogler
R. M. Wagner
Q. Weitzel
V. Zabalza
F. Zandanel
R. Zanin
T. Arlen
T. Aune
M. Beilicke
W. Benbow
A. Bouvier
S. M. Bradbury
J. H. Buckley
V. Bugaev
K. Byrum
A. Cannon
A. Cesarini
L. Ciupik
M. P. Connolly
W. Cui
R. Dickherber
C. Duke
M. Errando
A. Falcone
J. P. Finley
G. Finnegan
L. Fortson
A. Furniss
N. Galante
D. Gall
S. Godambe
S. Griffin
J. Grube
G. Gyuk
D. Hanna
J. Holder
H. Huan
C. M. Hui
P. Kaaret
N. Karlsson
M. Kertzman
Y. Khassen
D. Kieda
H. Krawczynski
F. Krennrich
M. J. Lang
S. LeBohec
G. Maier
S. McArthur
A. McCann
P. Moriarty
R. Mukherjee
P. D. Nunez
R. A. Ong
M. Orr
A. N. Otte
N. Park
J. S. Perkins
A. Pichel
Martin Pohl
H. Prokoph
K. Ragan
L. C. Reyes
P. T. Reynolds
E. Roache
H. J. Rose
J. Ruppel
M. Schroedter
G. H. Sembroski
G. D. Sentuerk
Igor O. Telezhinsky
G. Tesic
M. Theiling
S. Thibadeau
A. Varlotta
V. V. Vassiliev
M. Vivier
S. P. Wakely
T. C. Weekes
D. A. Williams
B. Zitzer
U. Barres de Almeida
M. Cara
C. Casadio
C. C. Cheung
W. McConville
F. Davies
A. Doi
G. Giovannini
M. Giroletti
K. Hada
P. Hardee
D. E. Harris
W. Junor
M. Kino
N. P. Lee
C. Ly
J. Madrid
F. Massaro
C. G. Mundell
H. Nagai
E. S. Perlman
I. A. Steele
R. C. Walker
D. L. Wood
eng
uncontrolled
galaxies: active
eng
uncontrolled
galaxies: individual (M 87)
eng
uncontrolled
galaxies: jets
eng
uncontrolled
galaxies: nuclei
eng
uncontrolled
gamma rays: galaxies
eng
uncontrolled
radiation mechanisms: non-thermal
Institut für Physik und Astronomie
Referiert