Multi-wavelength Observations of H 2356-309

A. Abramowski; Fabio Acero; F. Aharonian; A. G. Akhperjanian; G. Anton; U. Barres de Almeida; A. R. Bazer-Bachi; Y. Becherini; B. Behera; W. Benbow; K. Bernloehr; A. Bochow; C. Boisson; J. Bolmont; V. Borrel; J. Brucker; F. Brun; P. Brun; R. Buehler; T. Bulik; I. Buesching; T. Boutelier; P. M. Chadwick; A. Charbonnier; R. C. G. Chaves; A. Cheesebrough; J. Conrad; L. -M. Chounet; A. C. Clapson; G. Coignet; L. Costamante; M. Dalton; M. K. Daniel; I. D. Davids; B. Degrange; C. Deil; H. J. Dickinson; A. Djannati-Ataï; W. Domainko; L. O'C. Drury; F. Dubois; G. Dubus; J. Dyks; M. Dyrda; K. Egberts; P. Eger; P. Espigat; L. Fallon; C. Farnier; S. Fegan; F. Feinstein; M. V. Fernandes; A. Fiasson; A. Foerster; G. Fontaine; M. Fuessling; S. Gabici; Y. A. Gallant; L. Gerard; D. Gerbig; B. Giebels; J. F. Glicenstein; B. Glueck; P. Goret; D. Goering; D. Hampf; M. Hauser; S. Heinz; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; A. Hoffmann; W. Hofmann; P. Hofverberg; M. Holleran; S. Hoppe; D. Horns; A. Jacholkowska; O. C. de Jager; C. Jahn; I. Jung; K. Katarzynski; U. Katz; S. Kaufmann; M. Kerschhaggl; D. Khangulyan; B. Khelifi; D. Keogh; D. Klochkov; W. Kluzniak; T. Kneiske; Nu. Komin; K. Kosack; R. Kossakowski; G. Lamanna; J. -P. Lenain; T. Lohse; C. -C. Lu; V. Marandon; A. Marcowith; Julien Masbou; D. Maurin; T. J. L. Mccomb; M. C. Medina; J. Mehault; R. Moderski; Emmanuel Moulin; M. Naumann-Godo; M. de Naurois; D. Nedbal; D. Nekrassov; N. Nguyen; B. Nicholas; J. Niemiec; S. J. Nolan; S. Ohm; J-F. Olive; E. de Ona Wilhelmi; B. Opitz; K. J. Orford; M. Ostrowski; M. Panter; M. Paz Arribas; G. Pedaletti; G. Pelletier; P. -O. Petrucci; S. Pita; G. Puehlhofer; M. Punch; A. Quirrenbach; B. C. Raubenheimer; M. Raue; S. M. Rayner; 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; F. Ryde; V. Sahakian; A. Santangelo; R. Schlickeiser; F. M. Schoeck; A. Schoenwald; U. Schwanke; S. Schwarzburg; S. Schwemmer; A. Shalchi; I. Sushch; M. Sikora; J. L. Skilton; H. Sol; L. Stawarz; R. Steenkamp; C. Stegmann; F. Stinzing; A. Szostek; P. H. Tam; J. -P. Tavernet; R. Terrier; O. Tibolla; M. Tluczykont; K. Valerius; C. van Eldik; G. Vasileiadis; C. Venter; L. Venter; J. P. Vialle; A. Viana; P. Vincent; M. Vivier; H. J. Voelk; F. Volpe; S. Vorobiov; S. J. Wagner; M. Ward; A. A. Zdziarski; A. Zech; H. -S. Zechlin

doi:10.1051/0004-6361/201014321

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Multi-wavelength Observations of H 2356-309

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Multi-wavelength Observations of H 2356-309

A. Abramowski, Fabio Acero, F. Aharonian, A. G. Akhperjanian, G. Anton, U. Barres de Almeida, A. R. Bazer-Bachi, Y. Becherini, B. Behera, W. Benbow, …

Astronomy & Astrophysics - A&A, Vol.516

2010

DOI: https://doi.org/10.1051/0004-6361/201014321

Abstract

AIMS: The properties of the broad-band emission from the high-frequency peaked BL Lac H 2356-309 (z=0.165) are investigated. METHODS: Very High Energy (VHE; E > 100 GeV) observations of H 2356-309 were performed with the High Energy Stereoscopic System (HESS) from 2004 through 2007. Simultaneous optical/UV and X-ray observations were made with the XMM-Newton satellite on June 12/13 and June 14/15, 2005. NRT radio observations were also contemporaneously performed in 2005. ATOM optical monitoring observations were also made in 2007. RESULTS: A strong VHE signal, ~13 sigma total, was detected by HESS after the four years HESS observations (116.8 hrs live time). The integral flux above 240 GeV is I(>240 GeV) = (3.06 +- 0.26 {stat} +- 0.61 {syst}) x 10^{-12} cm^{-2} s^{-1}, corresponding to ~1.6% of the flux observed from the Crab Nebula. A time-averaged energy spectrum is measured from 200 GeV to 2 TeV and is characterized by a power law (photon index of Gamma = 3.06 +- 0.15 {stat} +- 0.10 {syst}). Significant small-amplitude variations in the VHE flux from H 2356-309 are seen on time scales of months and years, but not on shorter time scales. No evidence for any variations in the VHE spectral slope are found within these data. The XMM-Newton X-ray measurements show a historically low X-ray state, characterized by a hard, broken-power-law spectrum on both nights. CONCLUSIONS: The broad-band spectral energy distribution (SED) of the blazar can be adequately fit using a simple one-zone synchrotron self-Compton (SSC) model. In the SSC scenario, higher VHE fluxes could be expected in the future since the observed X-ray flux is at a historically low level.

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Title: Multi-wavelength Observations of H 2356-309
Creators - without role: A. Abramowski - Universität Hamburg
Fabio Acero - Laboratoire de Physique Théorique
F. Aharonian - Dublin Institute For Advanced Studies
A. G. Akhperjanian - A. Alikhanyan National Laboratory
G. Anton - Friedrich-Alexander-Universität Erlangen-Nürnberg
U. Barres de Almeida - Durham University
A. R. Bazer-Bachi - Université Toulouse III - Paul Sabatier
Y. Becherini - Université Paris Cité
B. Behera - Heidelberg University
W. Benbow - Max Planck Society
K. Bernloehr
A. Bochow - Max Planck Innovation
C. Boisson - Kavli Institute for Particle Astrophysics and Cosmology
J. Bolmont - Laboratoire de Physique Nucléaire et de Hautes Énergies
V. Borrel - Université Toulouse III - Paul Sabatier
J. Brucker - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Brun - Université Paris Cité
P. Brun - CEA Paris-Saclay
R. Buehler
T. Bulik - University of Warsaw
I. Buesching
T. Boutelier - Université Joseph Fourier
P. M. Chadwick - Durham University
A. Charbonnier - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. C. G. Chaves - Max Planck Innovation
A. Cheesebrough - Durham University
J. Conrad - Stockholm University
L. -M. Chounet - Laboratoire Leprince-Ringuet
A. C. Clapson - Max Planck Society
G. Coignet - Laboratoire d’Annecy de Physique des Particules
L. Costamante
M. Dalton - Humboldt-Universität zu Berlin
M. K. Daniel - Durham University
I. D. Davids - North-West University
B. Degrange - École Polytechnique
C. Deil - Max Planck Society
H. J. Dickinson - Durham University
A. Djannati-Ataï - APC - Astrophysique des Hautes Energies
W. Domainko - Max Planck Innovation
L. O'C. Drury
F. Dubois - Centre National de la Recherche Scientifique
G. Dubus - Université Joseph Fourier
J. Dyks - Nicolaus Copernicus Astronomical Center
M. Dyrda - Institute of Nuclear Physics, Polish Academy of Sciences
K. Egberts - Universität Innsbruck
P. Eger - Friedrich-Alexander-Universität Erlangen-Nürnberg
P. Espigat - Université Paris Cité
L. Fallon - Dublin Institute For Advanced Studies
C. Farnier - Laboratoire de Physique Théorique
S. Fegan - Laboratoire Leprince-Ringuet
F. Feinstein - Institut National de Physique Nucléaire et de Physique des Particules
M. V. Fernandes - Universität Hamburg
A. Fiasson - Laboratoire d’Annecy de Physique des Particules
A. Foerster
G. Fontaine - Laboratoire Leprince-Ringuet
M. Fuessling
S. Gabici - Dublin Institute For Advanced Studies
Y. A. Gallant - Laboratoire de Physique Théorique
L. Gerard - Laboratoire AstroParticule et Cosmologie
D. Gerbig - Ruhr University Bochum
B. Giebels - Laboratoire Leprince-Ringuet
J. F. Glicenstein - CEA Paris-Saclay
B. Glueck
P. Goret - Institut de Recherche sur les Lois Fondamentales de l'Univers
D. Goering
D. Hampf - Universität Hamburg
M. Hauser - Heidelberg University
S. Heinz - Friedrich-Alexander-Universität Erlangen-Nürnberg
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Society
J. A. Hinton - University of Leeds
A. Hoffmann - University of Tübingen
W. Hofmann - Max Planck Innovation
P. Hofverberg - Max Planck Innovation
M. Holleran - North-West University
S. Hoppe - Max Planck Society
D. Horns - Universität Hamburg
A. Jacholkowska - Laboratoire de Physique Nucléaire et de Hautes Énergies
O. C. de Jager - North-West University
C. Jahn - Friedrich-Alexander-Universität Erlangen-Nürnberg
I. Jung - Friedrich-Alexander-Universität Erlangen-Nürnberg
K. Katarzynski - Nicolaus Copernicus University
U. Katz - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Kaufmann - Heidelberg University
M. Kerschhaggl - Humboldt-Universität zu Berlin
D. Khangulyan - Max Planck Innovation
B. Khelifi - École Polytechnique
D. Keogh - Durham University
D. Klochkov - University of Tübingen
W. Kluzniak - Nicolaus Copernicus Astronomical Center
T. Kneiske - Universität Hamburg
Nu. Komin - Institut de Recherche sur les Lois Fondamentales de l'Univers
K. Kosack - Institut de Recherche sur les Lois Fondamentales de l'Univers
R. Kossakowski - Laboratoire d’Annecy de Physique des Particules
G. Lamanna - Institut National de Physique Nucléaire et de Physique des Particules
J. -P. Lenain - Kavli Institute for Particle Astrophysics and Cosmology
T. Lohse - Humboldt-Universität zu Berlin
C. -C. Lu - Max Planck Innovation
V. Marandon - Université Paris Cité
A. Marcowith - Institut National de Physique Nucléaire et de Physique des Particules
Julien Masbou - Laboratoire d’Annecy de Physique des Particules
D. Maurin - Université Paris Cité
T. J. L. Mccomb - Durham University
M. C. Medina - Kavli Institute for Particle Astrophysics and Cosmology
J. Mehault - Institut National de Physique Nucléaire et de Physique des Particules
R. Moderski - Nicolaus Copernicus Astronomical Center
Emmanuel Moulin - CEA Paris-Saclay
M. Naumann-Godo - École Polytechnique
M. de Naurois - Université Paris Cité
D. Nedbal - Charles University
D. Nekrassov - Max Planck Innovation
N. Nguyen - Universität Hamburg
B. Nicholas - University of Adelaide
J. Niemiec - Institute of Nuclear Physics, Polish Academy of Sciences
S. J. Nolan - Durham University
S. Ohm - Max Planck Innovation
J-F. Olive - Université Toulouse III - Paul Sabatier
E. de Ona Wilhelmi
B. Opitz - Universität Hamburg
K. J. Orford - Durham University
M. Ostrowski - Jagiellonian University
M. Panter - Max Planck Innovation
M. Paz Arribas - Humboldt-Universität zu Berlin
G. Pedaletti - Heidelberg University
G. Pelletier - Centre National de la Recherche Scientifique
P. -O. Petrucci - Université Joseph Fourier
S. Pita - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
G. Puehlhofer
M. Punch - Université Paris Cité
A. Quirrenbach - Heidelberg University
B. C. Raubenheimer - North-West University
M. Raue
S. M. Rayner - Durham University
O. Reimer - Universität Innsbruck
M. Renaud - Université Paris Cité
R. de Los Reyes
F. Rieger
J. Ripken - Stockholm University
L. Rob - Charles University
S. Rosier-Lees - Institut National de Physique Nucléaire et de Physique des Particules
G. Rowell - University of Adelaide
B. Rudak - Nicolaus Copernicus Astronomical Center
C. B. Rulten - Durham University
J. Ruppel - Ruhr University Bochum
F. Ryde - KTH Royal Institute of Technology
V. Sahakian - A. Alikhanyan National Laboratory
A. Santangelo - University of Tübingen
R. Schlickeiser - Ruhr University Bochum
F. M. Schoeck
A. Schoenwald
U. Schwanke - Humboldt-Universität zu Berlin
S. Schwarzburg - University of Tübingen
S. Schwemmer - Heidelberg University
A. Shalchi - Ruhr University Bochum
I. Sushch - Humboldt-Universität zu Berlin
M. Sikora - Nicolaus Copernicus Astronomical Center
J. L. Skilton - University of Leeds
H. Sol - Kavli Institute for Particle Astrophysics and Cosmology
L. Stawarz
R. Steenkamp - University of Namibia
C. Stegmann - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Stinzing - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Szostek - Université Joseph Fourier
P. H. Tam - Heidelberg University
J. -P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
O. Tibolla - Max Planck Innovation
M. Tluczykont - Universität Hamburg
K. Valerius - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. van Eldik - Max Planck Innovation
G. Vasileiadis - Université de Montpellier
C. Venter - North-West University
L. Venter - Kavli Institute for Particle Astrophysics and Cosmology
J. P. Vialle - Institut National de Physique Nucléaire et de Physique des Particules
A. Viana - Institut de Recherche sur les Lois Fondamentales de l'Univers
P. Vincent - Centre National de la Recherche Scientifique
M. Vivier - Institut de Recherche sur les Lois Fondamentales de l'Univers
H. J. Voelk
F. Volpe - Stanford University
S. Vorobiov - Institut National de Physique Nucléaire et de Physique des Particules
S. J. Wagner - Heidelberg University
M. Ward - Durham University
A. A. Zdziarski - Nicolaus Copernicus Astronomical Center
A. Zech - Universität Hamburg
H. -S. Zechlin - Universität Hamburg
Publication Details: Astronomy & Astrophysics - A&A, Vol.516
Identifiers: 9939264309311
Academic Unit: Université de Montpellier
Language: English
Resource Type: Journal article
Local Fields: in2p3-00496913