Discovery of the peculiar supernova 1998bw in the error box of GRB980425
T.J. Galama, P.M. Vreeswijk, J. van Paradijs, C. Kouveliotou, T., Augusteijn, O.R. Hainaut, F. Patat, H. Boehnhardt, J. Brewer, V. Doublier,, J.-F. Gonzalez, C. Lidman, B. Leibundgut, J. Heise, J. in 't Zand, P.J., Groot, R.G. Strom, P. Mazzali, K. Iwamoto, K. Nomoto, H. Umeda

TL;DR
This paper reports the discovery of a highly luminous type Ic supernova, SN1998bw, coinciding with GRB980425, suggesting diverse mechanisms behind gamma-ray bursts and their associated supernovae.
Contribution
It presents the first association of a peculiar supernova with a gamma-ray burst, indicating different origins for GRBs beyond the standard afterglow model.
Findings
SN1998bw is a very luminous type Ic supernova.
The supernova's radio emission indicates relativistic expansion.
The supernova is spatially coincident with GRB980425 in a nearby galaxy.
Abstract
The discovery of X-ray, optical and radio afterglows of gamma-ray bursts (GRBs) and the measurements of the distances to some of them have established that these events come from Gpc distances and are the most powerful photon emitters known in the Universe, with peak luminosities up to 10^52 erg/s. We here report the discovery of an optical transient, in the BeppoSAX Wide Field Camera error box of GRB980425, which occurred within about a day of the gamma-ray burst. Its optical light curve, spectrum and location in a spiral arm of the galaxy ESO 184-G82, at a redshift z = 0.0085, show that the transient is a very luminous type Ic supernova, SN1998bw. The peculiar nature of SN1998bw is emphasized by its extraordinary radio properties which require that the radio emitter expand at relativistical speed. Since SN1998bw is very different from all previously observed afterglows of GRBs, our…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsGamma-ray bursts and supernovae · Astrophysical Phenomena and Observations · Pulsars and Gravitational Waves Research
