A sudden, intense multipeaked burst of gamma rays with energies greater than 100 keV. These bursts typically last for a few seconds to a minute and do not appear to repeat. Their source is currently unknown, but their uniform distribution across the sky suggests that they arise in either a spherical halo about the galaxy or at cosmological distances.
A sudden burst of gamma-rays coming from a source usually in deep space. The burst may last from a fraction of a second to several minutes.
Object that radiates tremendous amounts of energy in the form of gamma rays, possibly due to the collision and merger of two neutron stars initially in orbit around one another.