GCN Circular 18609
Subject
GRB151027A; Optical observations
Event
Date
2015-11-16T12:16:29Z (11 years ago)
From
G.C. Anupama at IIA,Bangalore <gca@iiap.res.in>
We observed the field of GRB 151027A (Maselli et al., GCN 18478) using
the 2m Himalayan Chandra Telescope of Indian Astronmical Observatory,
Hanle,
India. The GRB field was observed in Bessells R band, during 14:56 UT
to
16:20 UT on 2015-10-27. We obtained 20 frames, each of 150 seconds
exposure time. The optical afterglow of GRB 151027A (e.g., Maselli et
al.,
GCN 18478; Zheng & Filippenko, GCN 18479; Elenin et al., GCN 18480;
Perley & Cenko, GCN 18481) is clearly detected in each image. The
measured magnitudes, calibrated using nearby USNO B1.0 (R2 magnitudes)
stars are listed below.
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Time (UT start) Filter Mag error
14:56 R 16.60 0.06
15:36 R 16.67 0.07
16:20 R 16.86 0.08
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This message may be cited.
D.K. Sahu and G.C. Anupama (Indian Institute of Astrophysics, Bengaluru)