Other
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..526..215g&link_type=abstract
GAMMA-RAY BURSTS: 5th Huntsville Symposium. AIP Conference Proceedings, Volume 526, pp. 215-219 (2000).
Other
5
Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays, Observational Cosmology, Statistical And Correlative Studies Of Properties
Scientific paper
Temporal profiles of subpeaks detected in GRBs, belonging to a sample of 65 short duration bursts selected from the 3B catalog, have been studied by fitting the former with lognormal functions since most subpeaks exhibit fast rise and slow decay. We present statistical evidence for a systematic increase in the ratio of rise to decay time with peak position. Using weighted correlation analysis we find that decay time displays a strong anti-correlation with peak position. On the other hand, no significant correlation between rise time and instant of peak maximum has been observed. If subpeaks in a burst arise due to emission from distinct shells then those scenarios in which later shells either suffer less deceleration or have larger speeds so that they catch up with slower matter earlier, are favored as they provide the required explanation for the observed decay time versus peak position anti-correlation. .
Bhat Narayan P.
Das Gupta Patrick
Gupta Varsha
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