Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999
Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
Page(s) 463 - 464
DOI https://doi.org/10.1051/aas:1999310
Published online 15 September 1999
DOI: 10.1051/aas:1999310



Astron. Astrophys. Suppl. Ser. 138, 463-464

BeppoSAX detection and follow-up of GRB 980425

E. Pian1 - L. Amati1 - L.A. Antonelli2 - R.C. Butler3 - E. Costa4 - G. Cusumano5 - J. Danziger6 - M. Feroci4 - F. Fiore7 - F. Frontera18 - P. Giommi7 - N. Masetti1 - J.M. Muller7 - T. Oosterbroek9 - A. Owens9 - E. Palazzi1 - L. Piro4 - A. Castro-Tirado10 - A. Coletta7 - D. Dal Fiume1 - S. Del Sordo5 - J. Heise11 - L. Nicastro5 - M. Orlandini1 - A. Parmar9 - P. Soffitta4 - V. Torroni7 - J.J.M. in 't Zand11

Send offprint request: pian@tesre.bo.cnr.it


1 - Istituto Te.S.R.E., CNR, via Gobetti 101, I-40129 Bologna, Italy
2 - Osservatorio Astronomico di Roma, sede di Monteporzio Catone, Via Frascati 33, 00040 Monteporzio Catone, Italy
3 - Agenzia Spaziale Italiana, Viale Regina Margherita 120, Roma, Italy
4 - I.A.S., C.N.R., Via Fosso del Cavaliere, Area della Ricerca di Tor Vergata, I-00131 Rome, Italy
5 - I.F.C.A.I., CNR, via Ugo La Malfa 153, I-90146 Palermo, Italy
6 - Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, I-34131 Trieste, Italy
7 - BeppoSAX Scientific Data Center, Via Corcolle 19, I-00131 Rome, Italy
8 - Dip. di Fisica, Univ. di Ferrara, Via Paradiso 11, I-44100 Ferrara, Italy
9 - Astrophysics Division, SSD of ESA, ESTEC, P.O. Box 299, 2200 AG Noordwijk, The Netherlands
10 - IAA-CSIC, Granada, Spain and LAEFF-INTA, Madrid, Spain
11 - Space Research Organization Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands

Received March 16; accepted July 5, 1999

Abstract:

We present BeppoSAX GRBM and WFC light curves of GRB 980425 and NFI follow-up data taken in 1998 April, May, and November. The first NFI observation has detected within the $8^{\prime}$ radius error box of the GRB an X-ray source positionally consistent with the supernova SN 1998bw, exploded within a day of GRB 980425, 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 hard X-ray emission from a Type I supernova. The latter source exhibits only marginally significant variability. Based on these data, it is not possible to select either source as a firm candidate for the GRB counterpart.

Key words: gamma-rays: bursts

SIMBAD Objects

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.