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H.E.S.S. follow-up observation of GRB221009A

  • H.E.S.S. Collaboration
  • c/o DESY
  • Max-Planck-Institut für Kernphysik
  • Université Paris-Saclay
  • Dublin Institute for Advanced Studies
  • Yerevan State University
  • Landessternwarte Heidelberg
  • University of Groningen
  • Ip Paris
  • University of Namibia
  • North-West University
  • Universität Hamburg
  • Jagiellonian University
  • University of the Free State
  • University of Potsdam
  • Astroparticule and Cosmol APC
  • Linnaeus University, Växjö
  • University of the Witwatersrand, Johannesburg
  • Humboldt-Universität zu Berlin
  • University of Tübingen
  • LUTH - Laboratoire de l'Univers et de ses Theories
  • Sorbonne Université
  • University of Oxford
  • Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
  • University of Warsaw
  • Université Savoie Mont Blanc
  • Institute for Nuclear Physics
  • UMR 5797
  • University of Adelaide
  • Laboratoire Univers et Particules de Montpellier
  • Aix-Marseille Université
  • University of Innsbruck
  • Nicolaus Copernicus University
  • Rikkyo University
  • Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
  • University of Leicester
  • University of Amsterdam
  • Yerevan Physics Institute
  • Konan University
  • University of Tokyo
  • Riken

Résultats de recherche: Contribution à un journalArticle de conférenceRevue par des pairs

1 Citation (Scopus)

Résumé

GRB 221009A is the brightest gamma-ray burst ever detected. To probe the very-high-energy (VHE, >100 GeV) emission, the High Energy Stereoscopic System (H.E.S.S.) began observations 53 hours after the triggering event, when the brightness of the moonlight no longer precluded observations. No significant VHE emission from the gamma-ray burst is detected in an analysis of the obtained H.E.S.S. data. Differential and integral upper limits are computed using data from the third, fourth, and ninth nights after the initial detection of the GRB. The constraints derived from the H.E.S.S. observations complement the available multi-wavelength data. For example, the afterglow of GRB 221009A presents a novel opportunity to explore extreme Klein-Nishina effects, for which upper limits in the VHE band are valuable. We will present and discuss the results of the analysis and highlight the important role of IACTs in following up on such powerful events.

langue originaleAnglais
Numéro d'article705
journalProceedings of Science
Volume444
étatPublié - 27 sept. 2024
Evénement38th International Cosmic Ray Conference, ICRC 2023 - Nagoya, Japon
Durée: 26 juil. 20233 août 2023

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