Abstract

Contrary to popular belief, the great mysteries of cosmic gamma-ray bursts have not been solved. The distance scale for one class of bursts has indeed been established - they are cosmological - and the energetics indicate that bursts may be the most powerful explosions in the Universe. However, there is a class of bursts which appear to have a Euclidean distribution, and no counterparts have been found for them. Although virtually all bursts display X-ray afterglows, only one half have associated optical afterglows, and fewer still have radio afterglows. Finally, there is considerable debate over just what the energy source is - merging neutron stars, or hypernovae. I review briefly the observations of bursts and their counterparts.

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