Asymmetric subpeaks in short duration bursts

Bhat, P. N.; Gupta, Varsha; Das Gupta, Patrick
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p538
Academic Journal
Subpeaks in 65 short duration gamma ray bursts belonging to the 3B catalogue have been identified and are fitted with lognormal functions as most of them are of FRED kind. Characterising the symmetry of a subpeak by the ratio of rise and decay time, we find that statistically the first peak of a burst tends to be more asymmetric than the subsequent ones. In this work we have also studied the correlations between various parameters like duty cycle, hardness ratio, rapidity index etc. that characterize a burst. © 2000 American Institute of Physics.


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