34778
2013
2013
eng
1889
1901
13
3
434
article
Oxford Univ. Press
Oxford
HESS Collaboration
1
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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
36122
2012
2012
eng
18
2
746
article
IOP Publ. Ltd.
Bristol
HESS Collaboration, MAGIC Collaboration, VERITAS Collaboration
1
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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