Short Gamma Ray Bursts: Marking the Birth of Black Holes from Coalescing Compact Binaries

Inverse Compton radiation from GRB afterglows in the VHE range

“…Gamma ray bursts (GRBs) are energetic explosions, which indicates either death of a massive star (> 25M ) or merger of two compact objects in combination of a neutron star and a black-hole [1 -4]. In our current understanding, the GRB population follows a bimodal distribution based on which, collapsar-based GRBs stay active for long duration (T 90 > 2s), and merger-based GRBs last for very short duration (T 90 < 2s) [5,6]. T 90 is the time over which a GRB emits 90% of its total measured fluence.…”