15 years hunting for GRBs with H.E.S.S.

In this episode, we dive into the explosive world of Gamma-Ray Bursts (GRBs)—brief, intense pulses of sub-MeV gamma rays that are considered excellent laboratories for studying particle acceleration, capable of releasing up to $10^{51} - 10^{54}$ ergs of isotropic equivalent energy. We explore the newly published second H.E.S.S. gamma-ray burst catalogue, which details a massive 15-year observational campaign spanning from 2004 to 2019.

We discuss how the High Energy Stereoscopic System (H.E.S.S.) followed up on 89 different GRB alerts, yet found no *new* very-high-energy (VHE) signals beyond previously published detections. But as we...