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GCN Circular 15153

Subject
GRB 130831A: optical observations
Date
2013-09-01T01:56:19Z (12 years ago)
From
Luca Izzo at ICRA <Luca.Izzo@ICRA.it>
L. Izzo and L. D'Avino report:

We have observed the optical afterglow of GRB 130831A using a 0.32m =
f/9.3 Ritchey-Chretien telescope of the iTelescope network, at Siding =
Spring =96 Australia.

We have detected the afterglow in the R and V, but not in the B band. =
After an ensemble photometry, using nearby SDSS stars, and correction =
from SDSS to V and R filters, we have obtained  the following =
magnitudes:

R =3D 15.58 +- 0.09  (78 min post-trigger =96 240s exposure)

V =3D 16.89 +- 0.09  (92 min post-trigger =96 180 s exposure)

The R-composite image can be seen at
http://blacksabburst.files.wordpress.com/2013/08/r_median.png
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