Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..526..150b&link_type=abstract
GAMMA-RAY BURSTS: 5th Huntsville Symposium. AIP Conference Proceedings, Volume 526, pp. 150-154 (2000).
Physics
8
Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies
Scientific paper
Of the properties possessed by gamma-ray bursts, the most constraining on the physics of the emission region is the narrow distribution of E-peak (Ep), the photon energy at which the νFν curve is a maximum. The importance of this observation for gamma-ray burst theory has motivated us to study the influence of BATSE instrumental effects on the observed distribution. Two aspects of measuring the E-peak distribution were investigated: the derivation of the value of E-peak for a given burst, and the triggering of the BATSE instrument on bursts of different E-peak. We find that instrumental effects cannot account for the observed distribution. We use a log-normal E-peak distribution to model the observations, finding the number of bursts per unit decade must decrease rapidly as one moves away from the observed peak of the E-peak distribution for burst spectra that are normalized to a constant total flux. .
Brainerd Jerome J.
Briggs Michael Stephen
Mallozzi Robert S.
Pendleton Geoffrey N.
Preece Rob D.
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