Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-10-13
Astronomy and Astrophysics
Astrophysics
16 pages, Latex, 6 PostScript figures and 1 GIF figure, 2 tables, submitted to The Astrophysical Journal
Scientific paper
10.1086/308978
We present BeppoSAX follow-up observations of GRB980425 obtained with the Narrow Field Instruments (NFI) in April, May, and November 1998. The first NFI observation has detected within the 8' radius error box of the GRB an X-ray source positionally consistent with the supernova 1998bw, which exploded within a day of GRB980425, and a fainter X-ray source, not consistent with the position of the supernova. The former source is detected in the following NFI pointings and exhibits a decline of a factor of two in six months. If it is associated with SN 1998bw, this is the first detection of X-ray emission from a Type I supernova above 2 keV. The latter source exhibits only marginally significant variability. The X-ray spectra and variability of the supernova are compared with thermal and non-thermal models of supernova high energy emission. Based on the BeppoSAX data, it is not possible to firmly establish which of the two detected sources is the GRB X-ray counterpart, although probability considerations favor the supernova.
Amati Lorenzo
Antonelli Lucio Angelo
Butler Reginald C.
Castro-Tirado Alberto
Coletta A.
No associations
LandOfFree
BeppoSAX Observations of GRB980425: Detection of the Prompt Event and Monitoring of the Error Box does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with BeppoSAX Observations of GRB980425: Detection of the Prompt Event and Monitoring of the Error Box, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and BeppoSAX Observations of GRB980425: Detection of the Prompt Event and Monitoring of the Error Box will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-674918