Discovery of Very High Energy Gamma-Ray Emission from the BL Lac Object H2356-309 with the H.E.S.S. Cherenkov Telescopes

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; F. Breitling; A. M. Brown; R. Bühler; I. Büsching; S. Carrigan; P. M. Chadwick; L.-M. Chounet; R. Cornils; L. Costamante; B. Degrange; H. J. Dickinson; A. Djannati-Ataï; L. O'C. Drury; G. Dubus; K. Egberts; D. Emmanoulopoulos; P. Espigat; F. Feinstein; E. Ferrero; G. Fontaine; Seb. Funk; S. Funk; Y.A. Gallant; B. Giebels; J. F. Glicenstein; P. Goret; C. Hadjichristidis; D. Hauser; M. Hauser; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; W. Hofmann; M. Holleran; D. Horns; A. Jacholkowska; O. C. de Jager; B. Khélifi; Nu. Komin; A. Konopelko; I. J. Latham; R. Le Gallou; A. Lemière; M. Lemoine-Goumard; T. Lohse; J. M. Martin; O. Martineau-Huynh; A. Marcowith; C. Masterson; T. J. L. Mccomb; M. de Naurois; D. Nedbal; S. J. Nolan; A. Noutsos; K. J. Orford; J. L. Osborne; M. Ouchrif; M. Panter; G. Pelletier; S. Pita; G. Pühlhofer; M. Punch; B. C. Raubenheimer; M. Raue; S. M. Rayner; A. Reimer; O. Reimer; J. Ripken; L. Rob; L. Rolland; G. Rowell; V. Sahakian; L. Saugé; S. Schlenker; R. Schlickeiser; U. Schwanke; H. Sol; D. Spangler; F. Spanier; R. Steenkamp; C. Stegmann; G. Superina; J.-P. Tavernet; R. Terrier; C.G. Théoret; M. Tluczykont; C. van Eldik; G. Vasileiadis; C. Venter; P. Vincent; H. J. Völk; S. J. Wagner; M. Ward

doi:10.1051/0004-6361:20054732

Retour

Discovery of Very High Energy Gamma-Ray Emission from the BL Lac Object H2356-309 with the H.E.S.S. Cherenkov Telescopes

Article de revue

Open Access

Avec comité de lecture

Discovery of Very High Energy Gamma-Ray Emission from the BL Lac Object H2356-309 with the H.E.S.S. Cherenkov Telescopes

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.455, pp.461-466

2006

DOI: https://doi.org/10.1051/0004-6361:20054732

Résumé

gamma rays: observations

galaxies: active

galaxies: BL Lacertae objects: individual: H 2356-309

The extreme synchrotron BL Lac object H2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of approx. 40 h live-time with the H.E.S.S. (High Energy Stereoscopic System) array of atmospheric-Cherenkov telescopes (ACTs). Analysis of this data set yields, for the first time, a strong excess of 453 gamma-rays (10 standard deviations above background) from H2356-309, corresponding to an observed integral flux above 200 GeV of I(>200GeV) = (4.1+-0.5) 10^12 cm^-2.s^-1 (statistical error only). The differential energy spectrum of the source between 200 GeV and 1.3 TeV is well-described by a power law with a normalisation (at 1 TeV) of N_0 = (3.00 +- 0.80_stat +- 0.31_sys) 10^-13 cm^-2.s^-1.TeV^-1 and a photon index of Gamma = 3.09 +- 0.24_stat +- 0.10_sys. H2356-309 is one of the most distant BL Lac objects detected at very-high-energy gamma-rays so far. Results from simultaneous observations from ROTSE-III (optical), RXTE (X-rays) and NRT (radio) are also included and used together with the H.E.S.S. data to constrain a single-zone homogeneous synchrotron self-Compton (SSC) model. This model provides an adequate fit to the H.E.S.S. data when using a reasonable set of model parameters.

Fichiers et liens (2)

url

Find in HALAfficher

url

https://doi.org/10.1051/0004-6361:20054732Afficher

Published (Version of record) Ouvrir

Indicateurs

1 Consultations de la notice

Détails

Titre: Discovery of Very High Energy Gamma-Ray Emission from the BL Lac Object H2356-309 with the H.E.S.S. Cherenkov Telescopes
Créateurs - sans rôle: F. Aharonian - Max Planck Institute for Nuclear Physics
A. G. Akhperjanian - A. Alikhanyan National Laboratory
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 - Max Planck Institute for Nuclear Physics
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
F. Breitling - Humboldt-Universität zu Berlin
A. M. Brown - Durham University
R. Bühler - Max Planck Institute for Nuclear Physics
I. Büsching - North-West University
S. Carrigan - Max Planck Institute for Nuclear Physics
P. M. Chadwick - Durham University
L.-M. Chounet - Laboratoire Leprince-Ringuet
R. Cornils - Universität Hamburg
L. Costamante - Max Planck Institute for Nuclear Physics
B. Degrange - École Polytechnique
H. J. Dickinson - Durham University
A. Djannati-Ataï - AstroParticule et Cosmologie
L. O'C. Drury
G. Dubus - École Polytechnique
K. Egberts - Max Planck Institute for Nuclear Physics
D. Emmanoulopoulos - Heidelberg University
P. Espigat - Agence Parisienne du Climat
F. Feinstein - Centre National de la Recherche Scientifique
E. Ferrero - Heidelberg University
G. Fontaine - Laboratoire Leprince-Ringuet
Seb. Funk - Humboldt-Universität zu Berlin
S. Funk - Max Planck Institute for Nuclear Physics
Y.A. Gallant - Laboratoire de Physique Théorique
B. Giebels - Laboratoire Leprince-Ringuet
J. F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
P. Goret - CEA Paris-Saclay
C. Hadjichristidis - Durham University
D. Hauser - Max Planck Institute for Nuclear Physics
M. Hauser - Heidelberg University
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Institute for Nuclear Physics
J. A. Hinton - Heidelberg University
W. Hofmann - Max Planck Institute for Nuclear Physics
M. Holleran - North-West University
D. Horns - University of Tübingen
A. Jacholkowska - Laboratoire de Physique Théorique
O. C. de Jager - North-West University
B. Khélifi - Centre National de la Recherche Scientifique
Nu. Komin - Humboldt-Universität zu Berlin
A. Konopelko - Humboldt-Universität zu Berlin
I. J. Latham - Durham University
R. Le Gallou - Durham University
A. Lemière - Agence Parisienne du Climat
M. Lemoine-Goumard - École Polytechnique
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 - Centre d'étude spatiale des rayonnements
C. Masterson - Max Planck Institute for Nuclear Physics
T. J. L. Mccomb - Durham University
M. de Naurois - Laboratoire de Physique Nucléaire et de Hautes Énergies
D. Nedbal - Charles University
S. J. Nolan - Durham University
A. Noutsos - Durham University
K. J. Orford - Durham University
J. L. Osborne - Durham University
M. Ouchrif - Laboratoire de Physique Nucléaire et de Hautes Énergies
M. Panter - Max Planck Institute for Nuclear Physics
G. Pelletier - Université Joseph Fourier
S. Pita - Agence Parisienne du Climat
G. Pühlhofer - Heidelberg University
M. Punch - Agence Parisienne du Climat
B. C. Raubenheimer - North-West University
M. Raue - Universität Hamburg
S. M. Rayner - Durham University
A. Reimer - Ruhr University Bochum
O. Reimer - Ruhr University Bochum
J. Ripken - Universität Hamburg
L. Rob - Charles University
L. Rolland - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
G. Rowell - Max Planck Institute for Nuclear Physics
V. Sahakian - A. Alikhanyan National Laboratory
L. Saugé - Centre National de la Recherche Scientifique
S. Schlenker - Humboldt-Universität zu Berlin
R. Schlickeiser - Ruhr University Bochum
U. Schwanke - Humboldt-Universität zu Berlin
H. Sol - Centre National de la Recherche Scientifique
D. Spangler - Durham University
F. Spanier - Ruhr University Bochum
R. Steenkamp - University of Namibia
C. Stegmann - Humboldt-Universität zu Berlin
G. Superina - École Polytechnique
J.-P. Tavernet
R. Terrier - Agence Parisienne du Climat
C.G. Théoret - Agence Parisienne du Climat
M. Tluczykont - École Polytechnique
C. van Eldik - Max Planck Institute for Nuclear Physics
G. Vasileiadis - Université de Montpellier
C. Venter
P. Vincent
H. J. Völk
S. J. Wagner
M. Ward
Détails de publication: Astronomy & Astrophysics - A&A, Vol.455, pp.461-466
Identifiants: 99151500909311
Unité académique: Université de Montpellier
Langue: English
Type de ressource: Journal article
Champs locaux: in2p3-00124806