Profiles of γ-ray bursts and their component pulses

Details Profiles of γ-ray bursts and their component pulses Profiles of γ-ray bursts and their component pulses

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..384...91s&link_type=abstract

Gamma-ray bursts: 3rd Huntsville symposium. AIP Conference Proceedings, Volume 384, pp. 91-95 (1996).

Mathematics

Probability

Gamma-Ray Sources, Gamma-Ray Bursts, Mathematical Procedures And Computer Techniques

Scientific paper

One physically informative regularity of the otherwise heterogenous γ-ray bursts, is that many consist of well defined pulses. To objectively quantify burst temporal structures, we developed an automatic modeling procedure for time-tagged event (TTE) and time-to-spill (TTS) data that separates overlapping pulses and determines their energy-dependence. The crucially important initial guess solution is determined by wavelet-denoising a time series of delta-function photon arrival times, and then locating, modeling, and removing successive pulses (analogously to the clean deconvolution procedure of radio astronomy). The final model is then determined by minimizing a Bayesian likelihood function Pr(model|data) based on the Poisson probability distribution. This effort will yield statistical information on pulse rise-time, decay-time, peakedness, and amplitudes, plus their energy dependences-both within a single burst and for a large ensemble of bursts.

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