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GRB 040403: a faint X-ray rich Gamma-ray Burst discovered by INTEGRAL by Mereghetti, S.; Gotz, D.; Andersen, M. I.; Castro-Tirado, A.; Frontera, F.; Gorosabel, J.; Hartmann, D. H.; Hjorth, J.; Hudec, R.; Hurley, K.; Pizzichini, G.; Produit, N.; Tarana, A.; Topinka, M.; Ubertini, P.; de Ugarte, A. is a scholarly article available to read on EtoBox.

What is GRB 040403: a faint X-ray rich Gamma-ray Burst discovered by INTEGRAL about?

GRB 040403 is one of the faintest gamma-ray bursts for which a rapid and accurate localization has been obtained. Here we report on the gamma-ray properties of this burst, based on observations with the IBIS instrument aboard INTEGRAL, and the results of searches for its optical afterglow. The steep spectrum (power law photon index = 1.9 in the 20-200 keV range) implies that GRB 040403 is most likely an X-ray rich burst. Our optical limit of R > 24.2 at 16.5 hours after the burst, indicates a rather faint afterglow, similar to those seen in other relatively soft and faint bursts.

Author

Mereghetti, S.; Gotz, D.; Andersen, M. I.; Castro-Tirado, A.; Frontera, F.; Gorosabel, J.; Hartmann, D. H.; Hjorth, J.; Hudec, R.; Hurley, K.; Pizzichini, G.; Produit, N.; Tarana, A.; Topinka, M.; Ubertini, P.; de Ugarte, A.

Published

2004

Language

EN