Magnetar Giant Flare Originated GRB 200415A: Transient GeV emission, Time-Resolved ${\mathrm{E}}_{\mathrm{p}}-{\mathrm{L}}_{\mathrm{iso}}$ Correlation, and Implications

Vikas Chand, Jagdish C. Joshi, Rahul Gupta +12

Giant flares (GFs) are unusual bursts from soft gamma-ray repeaters (SGRs) that release an enormous amount of energy in a fraction of a second. The afterglow emission of these SGR-…