GCN Circular 15856
Subject
GRB 140211A: Khureltogot optical upper limits
Date
2014-02-17T20:00:50Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), N. Tungalag (Research Centre of Astronomy and
Geophysics MAS), S. Schmalz (AIP), V. Voropaev (KIAM), I.Molotov (KIAM),
A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift Swift GRB 140211A (Cummings et al.,
GCN 15816) with ORI-40 telescope of Khureltogot observatory (Mongolia)
starting on Feb., 11 (UT) 12:29:12, i.e., ~6 minutes after the trigger.
We took several unfiltered images of 60 s exposure. Within the enhanced
BAT error circle (Cummings et al., GCN 15820) we do not detect any
optical counterpart in differently stacked images.
Details of the photometry are following:
UT start-end t-T0 Exp. Filter OT UL (3 sigma)
(mid, days) (s)
12:29:12-12:30:12 0.00450 1*60 None n/d 17.0
12:29:12-12:40:31 0.00819 10*60 None n/d 18.0
12:29:12-15:18:33 0.10468 100*60 None n/d 18.8
The photometry is based on reference stars SDSS-DR9, (R mag,
transformation by Lupton 2005):
N SDSS_id R(Lupton)
1 J081706.72+201335.6 18.171
2 J081655.77+201624.8 18.078