GCN Circular 13668
Subject
GRB 120816A: optical upper limit
Date
2012-08-17T16:17:06Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Ivanov, V. Ivanov, V. Lysenko (Kuban State University), A. Pozanenko
(IKI)
We observed the field of the Swift GRB 120816A (Page et al., GCN 13654)
with 20-inch telescope of Kuban State University Astrophysical Observatory
on August 16 starting on (UT) 19:34:49. We took several series of 40 s and
60 s exposures using R filter. In a stacked image we do not detect any new
source in the enhanced XRT error circle (Osborne et al., GCN 13660), in
particular we do not detect the OT candidate (Rau et al., GCN 13657). A
preliminary photometry is based on the nearby USNO-B1.0 (R2) stars:
Start, T0+ Filter, Exposure, OT, uplim (3 sigma)
(UT) (mid, d) (s)
19:34:49 0.0115 R 40 n/d 16.0
19:36:01 0.0221 R 830 n/d 17.9
19:36:01 0.0539 R 3530 n/d 18.1