Short duration gamma-ray bursts are thought to be caused by:

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Short duration gamma-ray bursts are thought to be caused by mergers of neutron stars and/or black holes, which release a tremendous amount of energy in the form of gamma-ray bursts. This energy is released when the two objects get close enough to each other and merge, sending out powerful jets of radiation in opposite directions. Short duration gamma-ray bursts (GRBs) are thought to be caused by the mergers of neutron stars and/or black holes. This theory is supported by observations of gravitational waves and the afterglow of these events in other wavelengths of light. Other options, such as novae and white dwarf mergers, do not produce the high energy releases necessary to create GRBs. Supernovae and hypernovae can produce long duration GRBs, but not the shorter bursts observed in short duration GRBs.

Short Duration Gamma-Ray Bursts Are Thought to Be Caused By