GCN Circular 17459
Subject
GRB 150212A: Khureltogot optical upper limit
Date
2015-02-12T20:37:01Z (9 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), S. Schmalz (AIP), N. Tungalag (Research Center of
Astronomy and Geophysics MAS), A. Volnova (IKI), I.Molotov (KIAM), A.
Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of 150212A (Page et al., GCN 17449) with ORI-40
telescope of Khureltogot observatory on Feb., 12 starting on (UT)
11:32:28. We obtained 24 unfiltered images of 15 s exposure. We did not
detect any optical counterpart in XRT error circle (Evans et al. GCN
17452). Details of the photometry are following:
Date UT start t-T0 Filter Exp. uplim (3 sigma)
(mid, days) (s)
2015-02-12 11:32:28 0.02739 none 24*15 15.8
The star mentioned by Cenko et al. (GCNs 17451, 17454) is visible in our
combined image and have a brightness of 15.85 +/- 0.25.
The photometry is based on R magnitudes of nearby USNO-B1.0 stars
USNO-B1_id R2
1374-0373548 15.39
1374-0373502 14.41