Evidence for a supernova in reanalyzed optical and near-infrared images of GRB970228

Details Evidence for a supernova in reanalyzed optical and near-infrared images of GRB970228 Evidence for a supernova in reanalyzed optical and near-infrared images of GRB970228

1999-07-20

arxiv.org/abs/astro-ph/9907264v1

Astrophys.J.536:185-194,2000

Astronomy and Astrophysics

Astrophysics

Submitted to the Astrophysical Journal, 9 pages including 3 figures, uses emulateapj.sty

Scientific paper

10.1086/308909

We present B-, V-, R_c-, I_c-, J-, H-, K- and K'-band observations of the optical transient (OT) associated with GRB970228, based on a reanalysis of previously used images and unpublished data. In order to minimize calibration differences we have collected and analyzed most of the photometry and consistently determined the magnitude of the OT relative to a set of secondary field stars. We confirm our earlier finding that the early decay of the light curves (before March 6, 1997) was faster than that at intermediate times (between March 6 and April 7, 1997). At late times the light curves resume a fast decay (after April 7, 1997). The early-time observations of GRB970228 are consistent with relativistic blast-wave models but the intermediate- and late-time observations are hard to understand in this framework. The observations are well explained by an initial power law decay with index -1.73 +0.09 -0.12 modified at later times by a type-I_c supernova light curve. Together with the evidence for GRB980326 and GRB980425 this gives further support for the idea that at least some GRBs are associated with a possibly rare type of supernova.

Affiliated with

Also associated with

No associations

Rating

Evidence for a supernova in reanalyzed optical and near-infrared images of GRB970228 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 Evidence for a supernova in reanalyzed optical and near-infrared images of GRB970228, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for a supernova in reanalyzed optical and near-infrared images of GRB970228 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-438786