Time Resolved GRB Spectroscopy

Details Time Resolved GRB Spectroscopy Time Resolved GRB Spectroscopy

2000-02-09

arxiv.org/abs/astro-ph/0002207v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, Paper presented at the 5th Huntsville Symposium, Huntsville (Alabama) Oct. 1999

Scientific paper

10.1063/1.1361531

We present the main results of a study of time-resolved spectra of 43 intense GRBs detected by BATSE. We considered the 4-parameter Band model and the Optically Thin Synchrotron Shock model (OTSSM). We find that the large majority of time-resolved spectra of GRBs are in remarkable agreement with the OTSSM. However, about 15 % of initial GRB pulses show an apparent low-energy photon suppression. This phenomenon indicates that complex radiative conditions modifying optically thin emission may occur during the initial phases of some GRBs.

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