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HESS observations of γ-ray bursts in 2003-2007

  • F. Aharonian
  • , A. G. Akhperjanian
  • , U. Barres De Almeida
  • , A. R. Bazer-Bachi
  • , B. Beheral
  • , W. Benbow
  • , K. Bernlöhr
  • , C. Boisson
  • , A. Bochow
  • , V. Borrel
  • , I. Braun
  • , E. Brion
  • , J. Brucker
  • , P. Brun
  • , R. Bühler
  • , T. Bulik
  • , I. Büsching
  • , T. Boutelier
  • , S. Carrigan
  • , P. M. Chadwick
  • A. Charbonnier, R. C.G. Chaves, A. Cheesebrough, L. M. Chounet, A. C. Clapson, G. Coignet, M. Dalton, 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, D. Emmanoulopoulos, P. Espigat, C. Farnier, F. Feinstein, A. Fiasson, A. Förster, G. Fontaine, M. Füßling, S. Gabici, Y. A. Gallant, L. Gérard, B. Giebels, J. F. Glicenstein, B. Glück, P. Goret, C. Hadjichristidis, D. Hauser, M. Hauser, S. Heinz, 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, I. Jung, K. Katarzyński, S. Kaufmann, E. Kendziorra, M. Kerschhaggl, D. Khangulyan, B. Khélifi, D. Keogh, Nu Komin, K. Kosack, G. Lamanna, J. P. Lenain, T. Lohse, V. Marandon, J. M. Martin, O. Martineau-Huynh, A. Marcowith, D. Maurin, T. J.L. McComb, M. C. Medina, R. Moderski, E. Moulin, M. Naumann-Godo, M. De Naurois, D. Nedbal, D. Nekrassov, J. Niemiec, S. J. Nolan, S. Ohm, J. F. Olive, E. De Oña Wilhelmi
  • Max-Planck-Institut für Kernphysik
  • Dublin Institute for Advanced Studies
  • Yerevan Physics Institute
  • Department of Physics
  • Durham University
  • CNRS
  • Landessternwarte Heidelberg
  • Institut für Physik
  • Humboldt-Universität zu Berlin
  • LUTH - Laboratoire de l'Univers et de ses Theories
  • Universite Paris-Saclay
  • Physikalisches Institut
  • Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
  • Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
  • Unit for Space Physics
  • North-West University
  • LPNHE
  • Universités Paris VI and VII
  • Université Paris-Sud
  • Astroparticule and Cosmol APC
  • Institute for Nuclear Physics
  • Laboratoire Univers et Particules de Montpellier
  • Institut für Experimentalphysik
  • Universität Hamburg
  • School of Physics and Astronomy
  • University of Leeds
  • Institut für Astronomie und Astrophysik
  • University of Tübingen
  • Toruń Centre for Astronomy
  • Nicolaus Copernicus University
  • Charles University
  • European Associated Laboratory for Gamma-Ray Astronomy
  • CNRS and MPG

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59 Citations (Scopus)

Résumé

Aims. Very-high-energy (VHE; ≳100 GeV) γ-rays are expected from γ-ray bursts (GRBs) in some scenarios. Exploring this photon energy regime is necessary for understanding the energetics and properties of GRBs. Methods. GRBs have been one of the prime targets for the HESS experiment, which makes use of four Imaging Atmospheric Cherenkov Telescopes (IACTs) to detect VHE γ-rays. Dedicated observations of 32 GRB positions were made in the years 2003-2007 and a search for VHE γ-ray counterparts of these GRBs was made. Depending on the visibility and observing conditions, the observations mostly start minutes to hours after the burst and typically last two hours.Results. Results from observations of 22 GRB positions are presented. Evidence of a VHE signal was found neither in observations of any individual GRBs nor from stacking data from subsets of GRBs with higher expected VHE flux according to a model-independent ranking scheme. Upper limits for the VHE γ-ray flux from the GRB positions were derived. For those GRBs with measured redshifts, differential upper limits at the energy threshold after correcting for absorption due to extra-galactic background light are also presented.

langue originaleAnglais
Pages (de - à)505-512
Nombre de pages8
journalAstronomy and Astrophysics
Volume495
Numéro de publication2
Les DOIs
étatPublié - 1 févr. 2009
Modification externeOui

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