Astron. Astrophys. Suppl. Ser. 138, 465-466

On the possible association of SN1998bw and GRB980425

T.J. Galama ¹ - P.M. Vreeswijk ¹ - J. van Paradijs ^1,2 - C. Kouveliotou ^3,4 - T. Augusteijn ⁵ - F. Patat ⁵ - J. Heise ⁶ - J. in 't Zand ⁶ - P.J. Groot ¹ - R.A.M.J. Wijers⁷ - E. Pian⁸ - E. Palazzi⁸ - F. Frontera⁸ - N. Masetti⁸

Send offprint request: T.J. Galama

1 - Astronomical Institute "Anton Pannekoek"/CHEAF, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
2 - Physics Department, UAH, Huntsville, AL 35899, U.S.A.
3 - Universities Space Research Association, U.S.A.
4 - NASA Marshall Space Flight Center, ES-84, Huntsville, AL 35812, U.S.A.
5 - ESO, Casilla 19001, Santiago 19, Chile
6 - SRON Laboratory for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
7 - Dept. of Physics and Astronomy, SUNY, Stony Brook, NY 11794-3800, U.S.A.
8 - Istituto Tecnologie e Studio Radiazioni Extraterrestri, CNR, Bologna, Italy

Received December 29, 1998; accepted May 4, 1999

Abstract:

We here discuss the possibility that the peculiar supernova SN1998bw and the Gamma-Ray Burst GRB 980425 are associated. If the two are related, the energy radiated in $\gamma$ rays is at least four orders of magnitude less than in other GRBs, although its appearance is otherwise unremarkable: this suggests that very different mechanisms may give rise to GRBs.

Key words: gamma-rays: bursts -- (stars:) supernovae: individual: SN1998bw