The Spectroscopic Variability of GRB 021004

Details The Spectroscopic Variability of GRB 021004 The Spectroscopic Variability of GRB 021004

2002-10-17

arxiv.org/abs/astro-ph/0210403v2

Astrophys.J. 582 (2003) L5-L10

Astronomy and Astrophysics

Astrophysics

13 pages, two figures, revised per referee's comments, accepted for publication in ApJ Letters

Scientific paper

10.1086/367601

We present spectra of the optical transient (OT) associated with GRB 021004. The spectra show a blue continuum with superposed absorption features and one emission line. We confirm two intervening metal-line systems at z = 1.380 and z = 1.602 and one very strong absorption system at a redshift of z = 2.323. Ly_alpha emission is also seen at this redshift. While the spectrum of the OT overall cannot be simply described with a power law, the spectral index over the range 5500-8850 A is steep, F_nu ~ nu^(-0.96 +/- 0.03). Comparison of spectra from multiple epochs shows a distinct color evolution with the OT becoming redder with time over the first three days. This is the first clear example of color change in an OT detected spectroscopically.

Affiliated with

Also associated with

No associations

Rating

The Spectroscopic Variability of GRB 021004 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 The Spectroscopic Variability of GRB 021004, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Spectroscopic Variability of GRB 021004 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-671251