RJK Observations of the Optical Afterglow of GRB 991216

Details RJK Observations of the Optical Afterglow of GRB 991216 RJK Observations of the Optical Afterglow of GRB 991216

2000-03-29

arxiv.org/abs/astro-ph/0003429v2

2000, ApJ, 543, 61

Astronomy and Astrophysics

Astrophysics

Accepted to the Astrophysical Journal, 12 pages, 4 postscript figures

Scientific paper

10.1086/317102

We present near-infrared and optical observations of the afterglow to the Gamma-Ray Burst (GRB) 991216 obtained with the F. L. Whipple Observatory 1.2-m telescope and the University of Hawaii 2.2-m telescope. The observations range from 15 hours to 3.8 days after the burst. The temporal behavior of the data is well described by a single power-law decay with index -1.36 +/-0.04, independent of wavelength. The optical spectral energy distribution, corrected for significant Galactic reddening of E(B-V)=0.626, is well fitted by a single power-law with index -0.58 +/- 0.08. Combining the IR/optical observations with a Chandra X-ray measurement gives a spectral index of -0.8 +/- 0.1 in the synchrotron cooling regime. A comparison between the spectral and temporal power-law indices suggest that a jet is a better match to the observations than a simple spherical shock.

Affiliated with

Also associated with

No associations

Rating

RJK Observations of the Optical Afterglow of GRB 991216 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 RJK Observations of the Optical Afterglow of GRB 991216, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RJK Observations of the Optical Afterglow of GRB 991216 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-682779