On the Nature of ``X-Ray-Rich'' Gamma-Ray Bursts

Details On the Nature of ``X-Ray-Rich'' Gamma-Ray Bursts On the Nature of ``X-Ray-Rich'' Gamma-Ray Bursts

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.4501l&link_type=abstract

American Astronomical Society Meeting 202, #45.01; Bulletin of the American Astronomical Society, Vol. 35, p.764

Astronomy and Astrophysics

Astronomy

3

Scientific paper

About 40% of the GRBs that HETE-2 has detected and localized are ``X-ray-rich'' GRBs or X-Ray Flashes. HETE-2 observations of these bursts show that their durations and time histories are similar to those of GRBs, and that the spectral properties of GRBs, ``X-ray-rich GRBs, and X-Ray Flashes form a continuum. These results provide strong evidence that all of these kinds of bursts are produced by the same mechanism. We describe a model for GRBs that accounts for the properties of the prompt gamma-ray emission and the afterglows of ``X-ray-rich'' GRBs. This model implies that ``X-ray-rich'' GRBs may be a particularly useful laboratory for studying the nature of Type Ib/Ic core collapse supernovae.
This work was supported in part by NASA Contract NASW-4690 and NASA Grant NAG5-10759.

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