Gamma--Ray Bursts associated with Supernovae: A systematic analysis of BATSE GRB candidates

Details Gamma--Ray Bursts associated with Supernovae: A systematic analysis of BATSE GRB candidates Gamma--Ray Bursts associated with Supernovae: A systematic analysis of BATSE GRB candidates

2005-10-03

arxiv.org/abs/astro-ph/0510058v1

Astronomy and Astrophysics

Astrophysics

12 pages, 8 figures, 1 table - accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20052803

We examined the properties of a sample of BATSE Gamma--Ray Bursts (GRBs) comprising events which have indications of association with a supernova (SN), some on the basis of indications of re--brightening in the optical afterglow light curve, but in most cases based only on the `loose' temporal and directional coincidence inferred from the cross correlation of catalogs. Despite of the large uncertainties in the latter selection method, the temporal and spectral analysis reveal three interesting statistical results when the sample is compared with that of all the BATSE GRBs: the GRBs tentatively associated with SNe are found to predominantly (in $\sim$ 80% of the cases) have single-peaked light curves, a softer spectrum (i.e. low energy power law index $\alpha \sim$ --1.5) and tend not to follow the Lag-Luminosity and Isotropic Energy--Peak Energy correlations. These three independent statistical properties point toward the existence of a significant number of under-luminous,GRB 980425-like events constituting -- at least from an observational point of view -- a tail or a separate class with respect to the whole of the BATSE GRB events. The unusually high percentage of SN Ibc among those identified by the catalog cross--correlation (factor $\sim 4$ higher than expected from SN catalog statistics) reinforces the non-randomness of (some of) the selected events.

Affiliated with

Also associated with

No associations

Rating

Gamma--Ray Bursts associated with Supernovae: A systematic analysis of BATSE GRB candidates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Gamma--Ray Bursts associated with Supernovae: A systematic analysis of BATSE GRB candidates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma--Ray Bursts associated with Supernovae: A systematic analysis of BATSE GRB candidates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-134029