X-ray Spectral Diagnostics of Gamma-Ray Burst Environments

Details X-ray Spectral Diagnostics of Gamma-Ray Burst Environments X-ray Spectral Diagnostics of Gamma-Ray Burst Environments

2000-04-13

arxiv.org/abs/astro-ph/0004188v1

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures, accepted for publication in ApJ Letters

Scientific paper

10.1086/312699

Recently, the detection of discrete features in the X-ray afterglow spectra of GRB970508 and GRB970828 was reported. The most natural interpretation of these features is that they are redshifted Fe K emission complexes. The identification of the line emission mechanism has drastic implications for the inferred mass of radiating material, end hence the nature of the burst site. X-ray spectroscopy provides a direct observational constraint on these properties of gamma-ray bursters. We briefly discuss how these constraints arise, in the context of an application to the spectrum of GRB970508.

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