The origin of the prompt GRB spectrum

Abstract

Using a detailed model of the internal shock phase, we discuss the origin of the prompt emission in gamma-ray bursts. We focus on the identification of the dominant radiative process (Fermi-GBM range) and propose an explanation for some features observed by Fermi-LAT at high energy in some GRB lightcurves.

2009 Fermi Symposium, eConf Proceedings C091122;