Ponente
Descripción
The detection of Gamma-Ray Bursts (GRBs) at Very High Energy (E > 100 GeV) was a long-awaited result, and many observations were needed before achieving this goal. The study presented here is based on a complete re-analysis of 15 years of GRB observations with the High-Energy Stereoscopic System (H.E.S.S.) providing the most extensive set of VHE upper limits to date.
This study contributes to the better understanding of the VHE emission of GRBs by showing that GRBs detected at VHE are not a distinct population but are bright events at low redshifts. For the most interesting events in our sample, we modeled the afterglow emission, combining the H.E.S.S. limits with publicly available multi-wavelength data to discuss the obtained microphysical parameters.
These results place existing VHE detections into perspective and give insight on the ability of the Cherenkov Telescope Array Observatory (CTAO) to detect fainter and high-redshift GRBs at VHE.
