The Polarization Variability in the Optical Afterglow of GRB 990712

Details The Polarization Variability in the Optical Afterglow of GRB 990712 The Polarization Variability in the Optical Afterglow of GRB 990712

2000-09-15

arxiv.org/abs/astro-ph/0009243v1

Astronomy and Astrophysics

Astrophysics

10 pages, 2 figures. Accepted for publication in ApJ Letters

Scientific paper

10.1086/312907

In a recent paper, Rol and colleagues present evidence for a variable polarization in the optical afterglow following the gamma-ray burst GRB 990712. The variation is highly significant, but the position angle appears time independent. Contrary to their conclusion, we point out that this can in fact be explained with existing afterglow models, namely that of a laterally expanding jet.

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