GRB021125: the first GRB imaged by INTEGRAL
G. Malaguti, A. Bazzano, V. Beckmann, A. J. Bird, M. Del Santo, G. Di Cocco, L. Foschini, P. Goldoni, D. Gotz, S. Mereghetti, A. Paizis, A. Segreto, G. Skinner, P. Ubertini, A. von Kienlin
Abstract
In the late afternoon of November 25, 2002 a gamma-ray burst (GRB) was detected in the partially coded field of view (about 7.3 deg from the centre) of the imager IBIS on board the INTEGRAL satellite. The instruments on-board INTEGRAL allowed, for the first time, the observation of the prompt gamma-ray emission over a broad energy band from 15 to 500 keV. GRB021125 lasted ~24 s with a mean flux of ~5.0 photons/cm2/s in the 20-500 keV energy band, and a fluence of 4.8x10-5 erg/cm2 in the same energy band. Here we report the analysis of the data from the imager IBIS and the spectrometer SPI.
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