GCN Circular 13179
Subject
GRB 120324A: CrAO optical upper limit
Date
2012-03-31T11:30:44Z (13 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev, K. Antonyuk (CrAO), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of GRB 120324A (Zhang et al., GCN 13090) with AZT-11
telescope of CrAO observatory starting on March 25 (UT) 01:46:17 under
moderate weather conditions and seeing of about 2.7 arsces. Within
enhanced Swift-XRT position (Evans et al., GCN 13093) we do not detected
any optical source up to R=20.7. The source reported in (Guidorzi et al.,
GCN 13092; Im et al., GCN 13097; Sudilovsky et al., GCN 13098) is clearly
detected and have a brightness R=20.16 +/-0.25. A photometry is based on
the USNO-B1.0 star 1141-0365943 (19 24 20.29 +24 07 58.2) assuming
R=17.07:
T0+ Filter, Exposure, OT, uplim (3 sigma)
(mid, d) (s)
0.8411 R 16x180 n/d 20.7