OBSERVATIONS FROM THE GAMMA-RAY BURST EXPERIMENT ONBOARD THE SROSS-C SATELLITE

A gamma-ray burst (GRB) experiment was launched onboard the SROSS-C sa tellite on May 20, 1992. The experiment covered an energy domain of 20 keV-3 MeV and had a time resolution of 2 ms. It operated satisfactori ly till the re-entry of the satellite on July 14, 1999. The experiment recorded high resolution temporal and spectral data on a few interest ing events. Details of three of them and their preliminary analysis ar e presented. Of these three events the one which was detected on June 29, in particular, exhibits strong oscillations with a pronounced peri odicity of 237.03 +/- 0.5 ms. Possible explanations for this fast vari ability are explored in this paper.