BATSE Observations of Gamma-Ray Burst Tails

Details BATSE Observations of Gamma-Ray Burst Tails BATSE Observations of Gamma-Ray Burst Tails

2001-11-29

arxiv.org/abs/astro-ph/0111564v1

Astronomy and Astrophysics

Astrophysics

33 Pages from LaTex including 7 figures, with aastex. To appear in Astrophysical Journal

Scientific paper

10.1086/338695

I discuss in this paper the phenomenon of post-burst emission in BATSE gamma-ray bursts at energies traditionally associated with prompt emission. By summing the background-subtracted signals from hundreds of bursts, I find that tails out to hundreds of seconds after the trigger may be a common feature of long events (duration greater than 2s), and perhaps of the shorter bursts at a lower and shorter-lived level. The tail component appears independent of both the duration (within the long GRB sample) and brightness of the prompt burst emission, and may be softer. Some individual bursts have visible tails at gamma-ray energies and the spectrum in at least a few cases is different from that of the prompt emission.

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