Scientists from the RIKEN Cluster for Pioneering Research and collaborators have used simulations to show that the photons emitted by long gamma-ray bursts–one of the most energetic events to take place in the universe–originate in the photosphere–the visible portion of the “relativistic jet” that is emitted by exploding stars.
Click here for original story, Pinpointing The Origin of Photons in Mysterious Gamma-ray Bursts
Source: Astronomy