Computer Science
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996grb..symp.....l&link_type=abstract
Conference Paper, Symposium on Gamma Ray Bursts
Computer Science
Statistical Analysis, Cosmic Rays, Radiation Detectors, Gamma Ray Bursts, Gamma Rays, Time Functions, Temporal Resolution, Maximum Likelihood Estimates, Gamma Ray Observatory, Photons
Scientific paper
The time profiles of many gamma-ray bursts observed by BATSE consist of distinct pulses, which offer the possibility of characterizing the temporal structure of these bursts using a relatively small set of pulse-shape parameters. This pulse analysis has previously been performed on some bright, long bursts using binned data, and on some short bursts using BATSE Time-Tagged Event (TTE) data. The BATSE Time- to-Spill (TTS) burst data records the times required to accumulate a fixed number of photons, giving variable time resolution. The spill times recorded in the TTS data behave as a gamma distribution. We have developed an interactive pulse-fitting program using the pulse model of Norris et al. and a maximum-likelihood fitting algorithm to the gamma distribution of the spill times. We then used this program to analyze a number of bright, long bursts for which TTS data is available. We present statistical information on the attributes of pulses comprising these bursts.
Bloom Elliott
Lee Adrian
Scargle Jeffrey
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