A CLASSICAL GAMMA-RAY BURST REPEATER, GBS-0855-00

We find in the sample of gamma-ray bursts, observed by the BATSE exper iment on the Compton Gamma Ray Observatory, a conspicuous set of burst s, GB 910430, GB 910501, GB 910502, GB 910722, and GB 910725, which ar e clustered in both space and time, separated in position by less than their positional uncertainty and separated in time by less than a few days. From a statistical analysis of the clustering, we find that the se five burst positions are consistent with a single, common source at the 85% confidence level, while we estimate that the probability of s uch a cluster of five bursts being random is less than 2 x 10(-3). Thu s, we suggest that these bursts arise from a repeating source at a loc ation of approximately 0855-00. Unlike most of the ''soft'' gamma-ray repeaters, these repeating bursts have relatively hard spectra, and wi dely varying durations and light curves, that are indistinguishable fr om the common, '' classical '' gamma-ray bursts.