Prompt Emission Properties of Swift GRBs

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gamma-Ray Sources (Astronomical), Spectral Analysis, Redshift, Telescopes, Gamma-Ray Sources, Gamma-Ray Bursts, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, X- And Gamma-Ray Telescopes And Instrumentation

Scientific paper

We present the results from the second Swift BAT catalog of 476 gamma-ray bursts, which contains bursts detected by the BAT between 2004 December 19 and 2009 December 21. In addition to the spectral and temporal parameters extracted from the first BAT GRB catalog, 3324 time-resolved spectra have been extracted and analyzed. We show and discuss 1) the duration distribution, 2) the hardness of short GRBs, 3) Epeak distribution, 4) the line of death problem and 5) an additional power-law component in the prompt emission spectrum.

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