Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE

Details Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE Spectral analysis of 35 GRBs/XRFs observed with HETE-2/FREGATE

2002-06-21

arxiv.org/abs/astro-ph/0206380v2

Astronomy and Astrophysics

Astrophysics

14 pages, 43 figures, accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20030074

We present a spectral analysis of 35 GRBs detected with the HETE-2 gamma-ray detectors (the FREGATE instrument) in the energy range 7-400 keV. The GRB sample analyzed is made of GRBs localized with the Wide Field X-ray Monitor onboard HETE-2 or with the GRB Interplanetary Network. We derive the spectral parameters of the time-integrated spectra, and present the distribution of the low-energy photon index, alpha, and of the peak energy, e_peak . We then discuss the existence and nature of the recently discovered X-Ray Flashes and their relationship with classical GRBs.

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