Quantifying GRB Pulse Shape Evolution to Study the Pulse Scale Conjecture

Details Quantifying GRB Pulse Shape Evolution to Study the Pulse Scale Conjecture Quantifying GRB Pulse Shape Evolution to Study the Pulse Scale Conjecture

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714104m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #141.04; Bulletin of the American Astronomical Society, Vol. 43, 2011

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The asymmetry of isolated gamma ray burst pulses is quantified by a simple ratio of rising to decaying fluence. This ratio can be defined in a background independent way by using only the peak of the pulse. This ratio is used to explore the prevalence of the Pulse Scale Conjecture (PSC; Nemiroff 2000) for a series of the brightest isolated BATSE GRB pulses known. The PSC posits that the shape of a GRB pulse is invariant across energy channels, scaling only in time and brightness. Within statistical uncertainties, it is found that some GRB pulses hold well to the PSC, whereas others do not. Moreover, for some GRB pulses, the PSC appears to hold only between specific energy channels. Examples will be shown and discussed.

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