Gamma Ray Burst 2005 John Hylton
The currently favored model for the origin of most observed gamma-ray bursts is the collapsar model, in which the core of an extremely massive, low-metallicity, rapidly-rotating star collapses into a black hole, and the infall of material from the star onto the black hole powers an extremely energetic jet that blasts outward through the stellar envelope. When the jet reaches the stellar surface, a gamma-ray burst is produced.