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.
Brief intense gamma-ray emission from an unknown source.
an event that occurs at random almost nightly
a short, intense flash of gamma rays that can last from a few milliseconds to about a hundred seconds
A brief, but brilliant, burst of gamma-rays coming from a random point in the sky about once per day.
Among the most powerful events in the Universe, a gamma-ray burst is believed to be the extremely powerful energy discharge of a black hole forming from the death of a giant star. Though the gamma-ray emission lasts only a few minutes to hours, the radio wave afterglow from the burst can last more than a year, making long-term observations of these enigmatic objects possible.
A short, intense burst of gamma radiation coming from a highly localizable, random direction. These emission events are constrained by observations to have occurred outside the solar system, most likely at large distances ("cosmological distances") but the source of such events remains unknown. Gamma-ray bursts occur several times each day. More.
a short, intense burst of high-energy radiation emanating from the distant universe
A burst of gamma rays from space. GRBs are registered about twice a day by satellites in orbit. The bursts may last from as little as a hundredth of a second up to 90 minutes. GRBs are extremely far away and must be caused by tremendous explosions. They probably are hypernovae - exceptionally violent supernovae, or mergers of neutron stars or black holes.
A burst of gamma rays from space lasting from a fraction of a second to many minutes. There is no clear scientific consensus as to their cause. Recently, a determination of their distances, placed the origins of the bursts in other galaxies.
An outburst that radiates tremendous amounts of energy equal to or greater than a supernova, in the form of gamma rays and X-rays, in a few minutes. [More Info: Field Guide
A brief, intense, and powerful burst of gamma rays, the highest-energy, shortest-wavelength radiation in the electromagnetic spectrum. These bursts emanate from distant sources outside our galaxy and last only a few seconds. They are the brightest and most energetic explosions known.