ORIGIN OF THE GeV EMISSION DURING THE X-RAY FLARING ACTIVITY IN GRB 100728A
ORIGIN OF THE GeV EMISSION DURING THE X-RAY FLARING ACTIVITY IN GRB 100728A
Recently, Fermi-LAT detected GeV emission during the X-ray flaring activity in GRB 100728A. We study various scenarios for its origin. The hard spectrum of the GeV emission favors the external inverse Compton (EIC) origin in which X-ray flare photons are up-scattered by relativistic electrons in the external forward shock. This …