Speaker
Description
Gamma-ray bursts (GRBs) are the most luminous sources of electromagnetic radiation in the Universe, of which many fundamental aspects remain poorly understood. TeV gamma rays from GRBs are expected to provide crucial new information on the physical mechanisms of energy dissipation, particle acceleration and radiation in these enigmatic objects. After decades of searches, they were finally detected clearly from several recent events by Cherenkov telescopes: GRB 190114C by MAGIC, and GRB 180720B and GRB 190829A by HESS. An intriguing hint has also been seen in the short GRB 160821B by MAGIC. We discuss selected physical inferences from these results, including multi-messenger implications. We also address the prospects for further progress with CTA.
