Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3137...61k&link_type=abstract
In NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop p 61-68 (SEE N92-21874 12-90)
Astronomy and Astrophysics
Astronomy
16
Astronomical Spectroscopy, Gamma Ray Bursts, Gamma Ray Observatory, Light Curve, Criteria, Estimates, Oscillations, Shapes
Scientific paper
About 15 percent of the gamma ray bursts in the Burst and Transient Source Experiment (BATSE) data exhibit a simple light curve consisting mainly of a single pulse without fine substructures. In 12 of the burst profiles, the pulse shapes show a linear rise and decay. Three events have a distinct sharp rise followed by a long, almost exponential decay. Searches based on only a sharp rise selection criterion resulted in five more grbs with different profile complexities. In one case, we identify an envelope of fast oscillations with a long, softer tail lasting about 100 seconds. The majority of events were detectable at energies above 300 keV, with tentative estimates for fluences that vary between 4.0 x 10-8 and 5.4 x 10-6 ergs/sq cm. We describe here their general characteristics (durations, rise-decay times) and their hardness ratios.
Fishman Gerald J.
Kouveliotou Chryssa
Meegan Charles A.
Paciesas William Simon
Wilson Robert B.
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