GCN Circular 26615
Subject
GRB 191228A: Mondy optical upper limit
Date
2019-12-30T15:53:01Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Pozanenko (IKI), E. Klunko (ISTP), N. Pankov (HSE), K. Kamyshnikov
(HSE), E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-GRB-FuN:
We observed the field of GRB 191228A (Bernardini et al. GCN 26601)
with AZT-33IK telescope of Sayan observatory (Mondy) starting on Dec. 28
(UT) 11:15:09. We do not detect any optical object in the Enhanced
Swift-XRT position (Evans et al. GCN 26606). Preliminary photometry of
the field is following.
Date UT start t-T0 Filter Exp. OT UL(3sigma)
(mid, days) (s)
2019-12-28 11:15:09 0.48923 R 30*120 n/d 20.1
Photometry is based on the USNO-B2.0 nearby stars.