The E-peak distribution of the GRBs detected by HETE FREGATE instrument

C. Barraud (1) , J. L. Atteia (1) , J. F. Olive (1) , J. P. Dezalay (1)

1 CESR - Centre d'étude spatiale des rayonnements

The FREGATE gamma ray detector of HETE-2 is sensitive to photons between 6 and 400 keV. This sensitivity range, extended towards low energies, allows us to explore the emission of GRBs in hard X-rays. We fit the spectra of 23 GRBs with Band\'s spectral function in order to derive the distribution of their peak energies (E-peak). This distribution is then compared with the E-peak distributions measured by BATSE and GINGA.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

C. Barraud, J. L. Atteia, J. F. Olive, J. P. Dezalay. The E-peak distribution of the GRBs detected by HETE FREGATE instrument. 2003, pp.59. ⟨hal-00008563⟩