GCN Circular 23580
Subject
GRB 181228A: TSHAO optical upper limit
Date
2018-12-28T16:49:22Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), I. Reva (FAPHI), A. Pozanenko (IKI), E. Mazaeva (IKI),
S. Belkin (IKI), A. Kusakin (FAPHI), M. Krugov (FAPHI) report on behalf
of larger GRB follow-up collaboration:
We observed the field of GRB 181228A (Moss et al., GCN 23570;
Beardmoreet al., GCN 23574) with Zeiss-1000 1-m telescope of Tien Shan
Astronomical Observatory starting on Dec. 28 (UT) 13:35:51. We do not
detected the OT (D'Avanzo et al., GCN 23574; Lipunov et al. GCN
23576). Preliminary photometry of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-12-28 13:35:51 0.46359 R 21*120 n/d n/d 21.7
The photometry is based on nearby USNO-B1.0 star
USNO-B1.0_id R2
1032-0046066 16.66