The supernova 2003lw associated with X-ray flash 031203

Full text for this resource is not available from the Research Repository.

Thomsen, B, Hjorth, J, Watson, D, Gorosabel, J, Fynbo, J. P. U, Jensen, B. L, Andersen, M. I, Dall, T. H, Rasmussen, J. R, Bruntt, H, Laurikainen, E, Augusteijn, T, Pursimo, T, Germany, Lisa, Jakobsson, P and Pedersen, K (2004) The supernova 2003lw associated with X-ray flash 031203. Astronomy & Astrophysics, 419 (2). L21-L25. ISSN 0004-6361 (print) 1432-0746 (online)


The X-Ray Flash (XRF), 031203 with a host galaxy at z=0.1055, is, apart from GRB980425, the closest Gamma-Ray Burst (GRB) or XRF known to date. We monitored its host galaxy from 1-100 days after the burst. In spite of the high extinction to the source and the bright host, a significant increase and subsequent decrease has been detected in the apparent brightness of the host, peaking between 10 and 33 days after the GRB. The only convincing explanation is a supernova (SN) associated with the XRF, SN2003lw. This is the earliest time at which a SN signal is clearly discernible in a GRB/XRF (apart from SN1998bw). SN2003lw is extremely luminous with a broad peak and can be approximately represented by the lightcurve of SN1998bw brightened by ~0.55 mag, implying a hypernova, as observed in most GRB-SNe. The XRF-SN association firmly links XRFs with the deaths of massive stars and further strengthens their connection with GRBs. The fact that SNe are also associated with XRFs implies that Swift may detect a significant population of intermediate redshift SNe very soon after the SN explosions, a sample ideally suited for detailed studies of early SN physics.

Dimensions Badge

Altmetric Badge

Item type Article
Official URL
Subjects Historical > FOR Classification > 0201 Astronomical and Space Sciences
Current > Division/Research > Other
Keywords gamma rays, bursts, supernovae, stars, lightcurve, redshift, galaxies, XRF, GRB 031203
Citations in Scopus 78 - View on Scopus
Download/View statistics View download statistics for this item

Search Google Scholar

Repository staff login