Transition from Fireball to Poynting-flux-dominated Outflow in Three-Episode GRB 160625B

B. -B. Zhang, B. Zhang, A. J. Castro-Tirado +51

The ejecta composition is an open question in gamma-ray bursts (GRB) physics. Some GRBs possess a quasi-thermal spectral component in the time-resolved spectral analysis, suggestin…