The Statistical Determination of the Burst Energy Distribution

Details The Statistical Determination of the Burst Energy Distribution The Statistical Determination of the Burst Energy Distribution

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..662..140b&link_type=abstract

GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001: A Workshop Celebrating the First Year of the HETE Mission. AIP Conference Proceed

Astronomy and Astrophysics

Astronomy

Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

The shape of the distribution of the apparent energy radiated by a gamma-ray burst must be determined by the statistical analysis of well-defined burst samples. To convert the fluence into an energy requires the distance to the burst. A spectroscopic redshift is preferred, but the redshift can be estimated from the host galaxy's magnitude. The observed burst is drawn from the portion of the distribution above the detection threshold, and consequently this threshold must be known to recover the distribution. The detection threshold is the most restrictive of the thresholds of the different observations that characterize a burst (e.g., detecting the burst, localizing the afterglow, determining the redshift of the host galaxy). Current burst samples either have unknown detection thresholds, or rely on the currently uncertain luminosity-variability or luminosity-lag correlations.

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