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Paper: GRB Profiles Modelled as Relaxation Systems
Volume: 312, Third Rome Workshop on Gamma-Ray Bursts in the Afterglow Era
Page: 110
Authors: McBreen, S.; McBreen, B.; Hanlon, L.; Duggan, P.; Moran, L.
Abstract: The cumulative light curves of gamma-ray bursts (GRBs) were obtained by summing the BATSE counted. The smoothed profiles is much simpler than the complex and erratic running light curve that is normally used. For most GRBs the slope of the cumulative light curve (S) is approximately constant over a large fraction of the burst. This behaviour of GRBs is modeled as a relaxation system that continuously accumulates energy in the reservoir and discontinuously releases it. The slope is a measure of the cumulative power output of the central engine. A plot of S versus peak flux in 64 ms (P64ms) shows a very good correlation over a wide range for both long and short GRBs. No relationship was found between S and z for the GRBs with known redshift. The standard slope (S′), which is representative of the power output per unit time, is correlated separately with P64ms for both sub-classes indicating more powerful outbursts for the short GRBs. S′ is also anticorrelated with GRB duration. These results imply that GRBs are powered by accretion into a black hole.
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