We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The sub-energetic ?-ray burst GRB 031203 as a cosmic analogue to the nearby GRB 980425.
- Authors
Soderberg, A. M.; Kulkarni, S. R.; Berger, E.; Fox, D. W.; Sako, M.; Frail, D. A.; Gal-Yam, A.; Moon, D. S.; Cenko, S. B.; Yost, S. A.; Phillips, M. M.; Persson, S. E.; Freedman, W. L.; Wyatt, P.; Jayawardhana, R.; Paulson, D.
- Abstract
Over the six years since the discovery of the ?-ray burst GRB 980425, which was associated with the nearby (distance ~40?Mpc) supernova 1998bw, astronomers have debated fiercely the nature of this event. Relative to bursts located at cosmological distance (redshift z ˜ 1), GRB 980425 was under-luminous in ?-rays by three orders of magnitude. Radio calorimetry showed that the explosion was sub-energetic by a factor of 10. Here we report observations of the radio and X-ray afterglow of the recent GRB 031203 (refs 5-7), which has a redshift of z = 0.105. We demonstrate that it too is sub-energetic which, when taken together with the low ?-ray luminosity, suggests that GRB 031203 is the first cosmic analogue to GRB 980425. We find no evidence that this event was a highly collimated explosion viewed off-axis. Like GRB 980425, GRB 031203 appears to be an intrinsically sub-energetic ?-ray burst. Such sub-energetic events have faint afterglows. We expect intensive follow-up of faint bursts with smooth ?-ray light curves (common to both GRB 031203 and 980425) to reveal a large population of such events.
- Subjects
GAMMA ray bursts; GAMMA ray astronomy; X-ray bursts; METAPHYSICAL cosmology; ASTRONOMY; PHYSICAL sciences
- Publication
Nature, 2004, Vol 430, Issue 7000, p648
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/nature02757