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Article Dans Une Revue Astron.Astrophys. Année : 2024

INTEGRAL view of GRB 221009A - Prompt energetics and week-long hard X-ray afterglow

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The gamma-ray burst GRB 221009A is among the most luminous of its kind and its proximity to Earth has made it an exceptionally rare observational event. The International Gamma-ray Astrophysics Laboratory (INTEGRAL) was in an optimal aspect position to use its all-sky instruments for recording the prompt emission and early gamma-ray afterglow in unprecedented detail. Following the initial detection, a swiftly scheduled follow-up observation allowed for the hard X-ray afterglow time and spectral evolution to be observed for up to almost a week. The INTEGRAL hard X-ray and soft gamma-ray observations have started to bridge the energy gap between the traditionally well-studied soft X-ray afterglow and the high-energy afterglow observed by Fermi/LAT. We discuss the possible implications of these observations for follow-ups of multi-messenger transients with hard X-ray and gamma-ray telescopes.Key words: gamma rays: general / X-rays: bursts
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hal-04583170 , version 1 (23-05-2024)

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Volodymyr Savchenko, Pietro Ubertini, Angela Bazzano, James Craig Rodi, Elisabeth Jourdain, et al.. INTEGRAL view of GRB 221009A - Prompt energetics and week-long hard X-ray afterglow. Astron.Astrophys., 2024, 684, pp.L2. ⟨10.1051/0004-6361/202346336⟩. ⟨hal-04583170⟩
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