GCN Circular 14321
Subject
GRB 130313A: optical upper limit in Mondy observatory
Date
2013-03-16T19:54:28Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A.Volnova (SAI MSU/IKI), E. Klunko (ISTP), A. Pozanenko (IKI) report on
behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 130313A (Gompertz et al., GCN
14293) with AZT-33IK telescope of Sayan observatory (Mondy) on March 13
between (UT) 17:45:47 - 22:55:49. We took several images in R-filter of 90 s
exposure which cover partially the refined BAT error box (Barthelmy et al.,
GCN 14296). Within XRT position (Gompertz et al., GCN 14297; Osborne et
al., GCN 14300) we do not detect any source. Preliminary photometry of
combined images is following
UT start, t-t0 filter Exp. OT UL (3 sigma)
(mid, days) (s)
17:54:56 0.06737 R 20x90 n/d 20.3
17:54:56 0.17047 R 147x90 n/d 23.3
The photometry is based on two SDSS DR8 stars
SDSS J154537.18-001931.3 RA = 15 45 37.18 Dec = -00 19 31.3 (J2000), R =
18.95
SDSS J154535.15-001918.8 RA = 15 45 35.15 Dec = -00 19 18.8 (J2000), R =
16.76