GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow

Details GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow

2000-07-03

arxiv.org/abs/astro-ph/0007015v1

Astronomy and Astrophysics

Astrophysics

10 pages including 6 figures, accepted by ApJ. Uses aastex 5.0

Scientific paper

10.1086/317256

We report the detection of significant polarization in the optical afterglow of GRB990712 on three instances 0.44, 0.70 and 1.45 days after the gamma-ray burst, with (P, theta) being (2.9% +- 0.4%, 121.1 degr +- 3.5 degr), (1.2% +- 0.4%, 116.2 degr +- 10.1 degr) and (2.2% +- 0.7%, 139.2 degr +- 10.4 degr) respectively. The polarization is intrinsic to the afterglow. The degree of polarization is not constant, and smallest at the second measurement. The polarization angle does not vary significantly during these observations. We find that none of the existing models predict such polarization variations at constant polarization angle, and suggest ways in which these models might be modified to accommodate the observed behavior of this afterglow.

Affiliated with

Also associated with

No associations

Rating

GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow 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 GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-728266