X-ray bursts from GRS 1915+105 observed with IXAE

Abstract

The light curves of the galactic superluminal X-ray transient source GRS1915+105 observed with the pointed proportional counters (PPC) of Indian X-ray Astronomy Experiment (IXAE)on board IRS-P3 have revealed the presence of four types of intense X-ray bursts : regular persistent bursts, quasi-regular bursts and irregular bursts. Two of the four types of bursts are regular in occurrence and persist over extended durations. All the observed bursts have a slow exponential rise and a sharp linear decay. The regular bursts show two peak structure while the other type of bursts show multi-peak structure. The burst spectrum is hardest at the end of the decay.