GCN Circular 11175
Subject
GRB 100901A : HCT optical observations
Date
2010-09-02T13:34:34Z (14 years ago)
From
D.K. Sahu at Indian Inst of Astrophysics,Bangalore <dks@iiap.res.in>
D.K. Sahu, B.C. Bhatt, Sonam Arora and Pepsi Anto (IIA, Bangalore) report.
Optical afterglow of GRB 100901A (Immler et al. GCN 11159)
was obsrved with the 2m. Himalayan Chandra Telescope of the
Indian Astronomical Observatory, Hanle, India. A series of
exposures were taken in Bessell V, R and I bands, between
17:35 UT and 22:15 UT on 01/09/2010. The optical afterglow was
detected in all our frames. The preliminary R and I magnitudes
of the optical afterglow calibrated using USNO B1.0 1127-0027231
reference star (R=15.37, I=15.13) is as under:
Mid UT Exposure Filter Mag
17:42 300sec R 17.34 +/- 0.05
19:44 300sec R 17.03 +/- 0.05
22:05 300sec R 17.08 +/- 0.04
17:51 300sec I 17.05 +/- 0.05
19:51 300sec I 16.76 +/- 0.04
This message may be cited.