Nonthermal Gamma‐Ray/X‐Ray Flashes from Shock Breakout in Gamma‐Ray Burst–Associated Supernovae
Nonthermal Gamma‐Ray/X‐Ray Flashes from Shock Breakout in Gamma‐Ray Burst–Associated Supernovae
Thermal X-ray emission that is simultaneous with prompt gamma-ray emission has been detected for the first time from a supernova associated with a gamma-ray burst (GRB), namely GRB 060218/SN 2006aj. It has been interpreted as arising from the breakout of a mildly relativistic, radiation-dominated shock from a dense stellar wind …