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
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
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
37410
2014
2014
eng
10
571
article
EDP Sciences
Les Ulis
HESSS Collaboration
1
--
--
--
Long-term monitoring of PKS2155-304 with ATOM and HESS:investigation of optical/gamma-ray correlations in different spectral states
In this paper we report on the analysis of all the available optical and very high-energy gamma-ray (> 200 GeV) data for the BL Lac object PKS 2155-304, collected simultaneously with the ATOM and H.E.S.S. telescopes from 2007 until 2009. This study also includes X-ray (RXTE, Swift) and high-energy gamma-ray (Fermi-LAT) data. During the period analysed, the source was transitioning from its flaring to quiescent optical states, and was characterized by only moderate flux changes at different wavelengths on the timescales of days and months. A flattening of the optical continuum with an increasing optical flux can be noted in the collected dataset, but only occasionally and only at higher flux levels. We did not find any universal relation between the very high-energy gamma-ray and optical flux changes on the timescales from days and weeks up to several years. On the other hand, we noted that at higher flux levels the source can follow two distinct tracks in the optical flux-colour diagrams, which seem to be related to distinct gamma-ray states of the blazar. The obtained results therefore indicate a complex scaling between the optical and gamma-ray emission of PKS 2155 304, with different correlation patterns holding at different epochs, and a gamma-ray flux depending on the combination of an optical flux and colour rather than a flux alone.
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201424142
0004-6361
1432-0746
wos:2014
A39
WOS:000345282600058
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; 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; National Science Center
[2011/03/N/ST9/01867]
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 Böttcher
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. Forster
M. Fuling
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
Markus 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. Kiefeer
S. Klepser
D. Klochkov
W. Kluzniak
D. Kolitzus
Nu. Komin
K. Kosack
S. Krakau
F. Krayzel
P. P. Kruger
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. Puhlhofer
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. Schussler
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. Volk
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. Wornlein
D. Wouters
R. Yang
V. Zabalza
D. Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
H. -S. Zechlin
eng
uncontrolled
radiation mechanisms: non-thermal
eng
uncontrolled
galaxies: active
eng
uncontrolled
black hole physics
eng
uncontrolled
BL Lacertae objects: individual: PKS 2155-304
eng
uncontrolled
galaxies: jets
eng
uncontrolled
gamma rays: galaxies
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
38708
2015
2015
eng
2
580
other
EDP Sciences
Les Ulis
HESS Collaboration
1
--
--
--
H.E.S.S. detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud (vol 574, A100, 2015)
Astronomy and astrophysics : an international weekly journal
10.1051/0004-6361/201425070e
1432-0746
wos:2015
C1
WOS:000360020200143
Fernandez, D (reprint author), Univ Montpellier 2, IN2P3, CNRS, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France., diane_0077@hotmail.com; cyril.trichard@lapp.in2p3.fr
Attila Abramowski
Felix A. Aharonian
Faical Ait Benkhali
A. G. Akhperjanian
Ekrem Oǧuzhan Angüner
Michael Backes
Shangkari Balenderan
Arnim Balzer
Anna Barnacka
Yvonne Becherini
Julia Becker Tjus
David Berge
Sabrina Bernhard
Konrad Bernlöhr
E. Birsin
Jonathan Biteau
Markus Böttcher
Catherine Boisson
J. Bolmont
Pol Bordas
Johan Bregeon
Francois Brun
Pierre Brun
Mark Bryan
Tomasz Bulik
Svenja Carrigan
Sabrina Casanova
Paula M. Chadwick
Nachiketa Chakraborty
R. Chalme-Calvet
Ryan C. G. Chaves
M. Chretien
Sergio Colafrancesco
Gabriele Cologna
Jan Conrad
Claire Couturier
Yudong Cui
Isak Delberth Davids
Bernhard Degrange
Christoph Deil
P. deWilt
A. Djannati-Ataï
Wilfried Domainko
Axel Donath
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
Tanya Edwards
Kathrin Egberts
Peter Eger
P. Espigat
C. Farnier
Stephen Fegan
Fabrice Feinstein
Milton Virgilio Fernandes
Diane Fernandez
A. Fiasson
Gerard Fontaine
Andreas Förster
M. Fuessling
S. Gabici
M. Gajdus
Yves A. Gallant
Tania Garrigoux
G. Giavitto
Berrie Giebels
Jean-Francois Glicenstein
Daniel Gottschall
M. -H. Grondin
M. Grudzinska
Daniela Hadasch
S. Haeffner
Joachim Hahn
Jonathan Harris
Götz Heinzelmann
G. Henri
German Hermann
O. Hervet
Andreas Hillert
James Anthony Hinton
Werner Hofmann
Petter Hofverberg
Markus Holler
Dieter Horns
Alex Ivascenko
A. Jacholkowska
C. Jahn
Marek Jamrozy
M. Janiak
F. Jankowsky
I. Jung-Richardt
Max Anton Kastendieck
K. Katarzynski
U. Katz
S. Kaufmann
B. Khelifi
Michel Kieffer
S. Klepser
Dmitry Klochkov
W. Kluzniak
David Kolitzus
Nu Komin
Karl Kosack
Steffen Krakau
F. Krayzel
Pat P. Krueger
H. Laffon
G. Lamanna
J. Lefaucheur
Valentin Lefranc
A. Lemiere
M. Lemoine-Goumard
J. -P. Lenain
Thomas Lohse
A. Lopatin
Chia-Chun Lu
Vincent Marandon
Alexandre Marcowith
Ramin Marx
G. Maurin
Nigel Maxted
Michael Mayer
T. J. Lowry McComb
J. Mehault
P. J. Meintjes
Ulf Menzler
M. Meyer
Alison M. W. Mitchell
R. Moderski
M. Mohamed
K. Mora
Emmanuel Moulin
Thomas Murach
Mathieu de Naurois
J. Niemiec
Sam J. Nolan
Louise Oakes
Hirokazu Odaka
S. Ohm
Björn Optiz
Michal Ostrowski
I. Oya
Michael Panter
R. Daniel Parsons
M. Paz Arribas
Nikki W. Pekeur
G. Pelletier
P. -O. Petrucci
B. Peyaud
S. Pita
Helen Poon
Gerd Pühlhofer
M. Punch
A. Quirrenbach
S. Raab
I. Reichardt
Anita Reimer
Olaf Reimer
Metz Renaud
Raquel de los Reyes
Frank Rieger
C. Romoli
S. Rosier-Lees
G. Rowell
B. Rudak
C. B. Rulten
Vardan Sahakian
D. Salek
David M. Sanchez
Andrea Santangelo
Reinhard Schlickeiser
F. Schuessler
A. Schulz
Ullrich Schwanke
S. Schwarzburg
S. Schwemmer
H. Sol
Felix Spanier
G. Spengler
Franziska Spies
Lukasz Stawarz
Riaan Steenkamp
Christian Stegmann
F. Stinzing
K. Stycz
Iurii Sushch
J. -P. Tavernet
T. Tavernier
A. M. Taylor
R. Terrier
Martin Tluczykont
C. Trichard
K. Valerius
C. van Eldik
B. van Soelen
Georges Vasileiadis
J. Veh
Christo Venter
Aion Viana
P. Vincent
Jacco Vink
Heinrich J. Völk
Francesca Volpe
Martine Vorster
T. Vuillaume
S. J. Wagner
P. Wagner
R. M. Wagner
Martin Ward
Matthias Weidinger
Quirin Weitzel
R. White
A. Wierzcholska
P. Willmann
A. Woernlein
D. Wouters
Ruizhi Yang
Victor Zabalza
Dmitry Zaborov
M. Zacharias
A. A. Zdziarski
Alraune Zech
Hannes -S. Zechlin
eng
uncontrolled
gamma rays: general
eng
uncontrolled
ISM: supernova remnants
eng
uncontrolled
ISM: clouds
eng
uncontrolled
errata, addenda
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
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
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