A New Method for Calculating T50 and T90 of Gamma Ray Bursts

Details A New Method for Calculating T50 and T90 of Gamma Ray Bursts A New Method for Calculating T50 and T90 of Gamma Ray Bursts

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.7510c&link_type=abstract

American Astronomical Society Meeting 207, #75.10; Bulletin of the American Astronomical Society, Vol. 37, p.1290

Statistics

Scientific paper

Durations of Gamma Ray Bursts have typically been described by T90 and T50 statistics, the time elapsed between detecting five and 95 percent, and 25 and 75 percent, respectively, of the burst fluence. BATSE measurements of these durations have led to the discovery of two separate populations of Gamma Ray Bursts. We describe a method to determine these statistics and their errors using a bootstrap technique. We also describe a new method for finding the start and end of bursts. Both methods are particularly well suited for coded aperture cameras, and in particular we show examples using the WXM instrument on board HETE.

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