Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-04-10
Astrophys.J. 552 (2001) L121-L124
Astronomy and Astrophysics
Astrophysics
4 pages, 1 figure, accepted for publication in ApJL
Scientific paper
10.1086/320328
The optical light curve of the afterglow following the gamma-ray burst GRB990712 is re-examined. Recently published polarization measurements of that source require a collimated outflow geometry that in turn predicts a break in the light curve. We show that the V-band light curve is consistent with such a break and that the post-break light curve evolution is dominated by a supernova contribution.
Bjornsson Gunnlaugur
Christensen Lars Lindberg
Hjorth Jens
Holland Simon
Jakobsson Páll
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