Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with H.E.S.S. and broadband characterisation

F. Aharonian; A. G. Akhperjanian; A.R. Bazer-Bachi; M. Beilicke; W. Benbow; D. Berge; K. Bernlöhr; C. Boisson; O. Bolz; V. Borrel; I. Braun; E. Brion; A. M. Brown; R. Buhler; I. Busching; T. Boutelier; S. Carrigan; P. M. Chadwick; L.M. Chounet; G. Coignet; R. Cornils; L. Costamante; B. Degrange; H. J. Dickinson; A. Djannati-Ataï; L. O'Connor-Drury; G. Dubus; K. Egberts; D. Emmanoulopoulos; P. Espigat; C. Farnier; F. Feinstein; E. Ferrero; A. Fiasson; G. Fontaine; S. Funk; M. Fuling; Y.A. Gallant; B. Giebels; J.F. Glicenstein; B. Glück; P. Goret; C. Hadjichristidis; D. Hauser; M. Hauser; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; A. Hoffmann; W. Hofmann; M. Holleran; S. Hoppe; D. Horns; A. Jacholkowska; O. C. de Jager; E. Kendziorra; M. Kerschhaggl; B. Khelifi; N. Komin; K. Kosack; G. Lamanna; I. J. Latham; R. Le Gallou; A. Lemiere; M. Lemoine-Goumard; T. Lohse; J.M. Martin; O. Martineau-Huynh; A. Marcowith; C. Masterson; G. Maurin; T. J. L. Mccomb; Emmanuel Moulin; M. de Naurois; D. Nedbal; S. J. Nolan; A. Noutsos; J.P. Olive; K. J. Orford; J. L. Osborne; M. Panter; G. Pelletier; P.O. Petrucci; S. Pita; G. Pühlhofer; M. Punch; S. Ranchon; B. C. Raubenheimer; M. Raue; S. M. Rayner; A. Reimer; O. Reimer; J. Ripken; L. Rob; L. Rolland; S. Rosier-Lees; G. Rowell; V. V. Sahakian; A. Santangelo; L. Sauge; S. Schlenker; R. Schlickeiser; R. Schröder; U. Schwanke; S. Schwarzburg; S. Schwemmer; A. Shalchi; H. Sol; D. Spangler; F. Spanier; R. Steenkamp; C. Stegmann; G. Superina; P. H. Tam; J.P. Tavernet; R. Terrier; M. Tluczykont; C. van Eldik; G. Vasileiadis; C. Venter; J.P. Vialle; P. Vincent; H. J. Völk; S. J. Wagner; M. Ward

doi:10.1051/0004-6361:20077057

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Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with H.E.S.S. and broadband characterisation

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Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with H.E.S.S. and broadband characterisation

F. Aharonian, A. G. Akhperjanian, A.R. Bazer-Bachi, M. Beilicke, W. Benbow, D. Berge, K. Bernlöhr, C. Boisson, O. Bolz, V. Borrel, …

Astronomy & Astrophysics - A&A, Vol.470, p.475-489

2007

DOI: https://doi.org/10.1051/0004-6361:20077057

Résumé

gamma rays: observations

galaxies: active

BL Lacertae objects: individual (1ES 1101-232)

The blazar 1ES 1101-232 was observed with the High Energy Stereoscopic System (H.E.S.S.) of Atmospheric Cherenkov Telescopes (ACT) in 2004 and 2005, for a live time of 43 hours. VHE (E > 10^11 eV) gamma-rays were detected for the first time from this object. VHE observations of blazars are used to investigate the inner parts of the blazar jets, and also to study the extragalactic background light (EBL) in the near-infrared band. Observations in 2005 were conducted in a multiwavelength campaign, together with the RXTE satellite and optical observations. In 2004, simultaneous observations with XMM-Newton were obtained. 1ES 1101-232 was detected with H.E.S.S. with an excess of 722 photons, at a significance of 12 sigma. The measured VHE gamma-ray flux amounts to dN/dE = (5.63 +- 0.89) x 10^-13 (E/TeV)^-(2.94 +- 0.20) cm^-2 s^-1 TeV^-1, above a spectral energy threshold of 225 GeV. No significant variation of the VHE gamma-ray flux on any time scale was found. 1ES 1101-232 exhibits a very hard spectrum, and at a redshift of z=0.186, is the blazar with the highest confirmed redshift detected in VHE gamma-rays so far. The data allow the construction of truly simultaneous spectral energy distributions of the source, from the optical to the VHE band. Using an EBL model with \nu F_\nu = 14 nW m^-2 sr^-1 at 1.5 \mu m as presented in Aharonian et al. (Nature, 2006, 440, 1018) suggests an intrinsic VHE power output peak of the source at above 3 TeV.

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Titre: Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with H.E.S.S. and broadband characterisation
Créateurs - sans rôle: F. Aharonian - Max Planck Institute for Nuclear Physics
A. G. Akhperjanian
A.R. Bazer-Bachi - Université Toulouse III - Paul Sabatier
M. Beilicke - Universität Hamburg
W. Benbow - Max Planck Institute for Nuclear Physics
D. Berge - Max Planck Institute for Nuclear Physics
K. Bernlöhr - Humboldt-Universität zu Berlin
C. Boisson - Observatoire de Paris
O. Bolz - Max Planck Institute for Nuclear Physics
V. Borrel - Université Toulouse III - Paul Sabatier
I. Braun - Max Planck Institute for Nuclear Physics
E. Brion - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
A. M. Brown
R. Buhler - Max Planck Institute for Nuclear Physics
I. Busching - North-West University
T. Boutelier - Université Joseph Fourier
S. Carrigan - Max Planck Institute for Nuclear Physics
P. M. Chadwick
L.M. Chounet - Laboratoire Leprince-Ringuet
G. Coignet - Laboratoire d’Annecy de Physique des Particules
R. Cornils - Universität Hamburg
L. Costamante - Max Planck Institute for Nuclear Physics
B. Degrange - École Polytechnique
H. J. Dickinson
A. Djannati-Ataï - APC - Astrophysique des Hautes Energies
L. O'Connor-Drury
G. Dubus - École Polytechnique
K. Egberts - Max Planck Institute for Nuclear Physics
D. Emmanoulopoulos - Cal Poly Humboldt
P. Espigat - Université Paris Cité
C. Farnier - Laboratoire de Physique Théorique
F. Feinstein - Laboratoire de Physique Théorique
E. Ferrero - Cal Poly Humboldt
A. Fiasson - Laboratoire de Physique Théorique
G. Fontaine - Laboratoire Leprince-Ringuet
S. Funk - Humboldt-Universität zu Berlin
M. Fuling
Y.A. Gallant - Institut National de Physique Nucléaire et de Physique des Particules
B. Giebels - Laboratoire Leprince-Ringuet
J.F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
B. Glück - Friedrich-Alexander-Universität Erlangen-Nürnberg
P. Goret - CEA Paris-Saclay
C. Hadjichristidis - Durham University
D. Hauser - Max Planck Institute for Nuclear Physics
M. Hauser - Cal Poly Humboldt
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Institute for Nuclear Physics
J. A. Hinton
A. Hoffmann - University of Tübingen
W. Hofmann - Max Planck Institute for Nuclear Physics
M. Holleran - North-West University
S. Hoppe - Max Planck Institute for Nuclear Physics
D. Horns - University of Tübingen
A. Jacholkowska - Laboratoire de Physique Théorique
O. C. de Jager
E. Kendziorra - University of Tübingen
M. Kerschhaggl - Humboldt-Universität zu Berlin
B. Khelifi - Laboratoire Leprince-Ringuet
N. Komin - Université de Montpellier
K. Kosack - Max Planck Institute for Nuclear Physics
G. Lamanna - Institut National de Physique Nucléaire et de Physique des Particules
I. J. Latham
R. Le Gallou - Durham University
A. Lemiere - Université Paris Cité
M. Lemoine-Goumard - Centre National de la Recherche Scientifique
T. Lohse - Humboldt-Universität zu Berlin
J.M. Martin - Observatoire de Paris
O. Martineau-Huynh - Laboratoire de Physique Nucléaire et de Hautes Énergies
A. Marcowith - Laboratoire d'Analyse et d'Architecture des Systèmes
C. Masterson - Max Planck Institute for Nuclear Physics
G. Maurin - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
T. J. L. Mccomb
Emmanuel Moulin - Université de Montpellier
M. de Naurois - Centre National de la Recherche Scientifique
D. Nedbal - Charles University
S. J. Nolan
A. Noutsos - Durham University
J.P. Olive - Université Toulouse III - Paul Sabatier
K. J. Orford
J. L. Osborne
M. Panter - Max Planck Institute for Nuclear Physics
G. Pelletier - Centre National de la Recherche Scientifique
P.O. Petrucci - Centre National de la Recherche Scientifique
S. Pita - Université Paris Cité
G. Pühlhofer - Heidelberg University
M. Punch - Collège de France
S. Ranchon - Laboratoire d’Annecy de Physique des Particules
B. C. Raubenheimer
M. Raue - Universität Hamburg
S. M. Rayner
A. Reimer
O. Reimer
J. Ripken - Universität Hamburg
L. Rob - Charles University
L. Rolland - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
S. Rosier-Lees - Laboratoire d’Annecy de Physique des Particules
G. Rowell - Max Planck Institute for Nuclear Physics
V. V. Sahakian
A. Santangelo - University of Tübingen
L. Sauge - Centre National de la Recherche Scientifique
S. Schlenker - Humboldt-Universität zu Berlin
R. Schlickeiser - Ruhr University Bochum
R. Schröder - Ruhr University Bochum
U. Schwanke - Humboldt-Universität zu Berlin
S. Schwarzburg - University of Tübingen
S. Schwemmer - Cal Poly Humboldt
A. Shalchi - Ruhr University Bochum
H. Sol - Centre National de la Recherche Scientifique
D. Spangler - Durham University
F. Spanier - Ruhr University Bochum
R. Steenkamp - University of Namibia
C. Stegmann - Friedrich-Alexander-Universität Erlangen-Nürnberg
G. Superina - École Polytechnique
P. H. Tam
J.P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - Université Paris Cité
M. Tluczykont - École Polytechnique
C. van Eldik - Max Planck Institute for Nuclear Physics
G. Vasileiadis - Laboratoire de Physique Théorique
C. Venter - North-West University
J.P. Vialle - Institut National de Physique Nucléaire et de Physique des Particules
P. Vincent - Institut National de Physique Nucléaire et de Physique des Particules
H. J. Völk
S. J. Wagner
M. Ward - Durham University
Détails de publication: Astronomy & Astrophysics - A&A, Vol.470, p.475-489
Identifiants: 9935115509311
Unité académique: Laboratoire Univers et Particules de Montpellier - LUPM
Langue: Anglais
Type de ressource: Article de revue scientifique
Champs locaux: in2p3-00148778