GCN Circular 23846
Subject
GRB 190203A: Koshka Zeiss-1000 optical upper limit
Date
2019-02-03T16:51:04Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Novichonok (KIAM), A. Pozanenko (IKI), E. Mazaeva (IKI), S. Belkin
(IKI), A. Volnova (IKI), I. Molotov (KIAM) report on behalf of larger
GRB follow-up collaboration:
We observed the field of GRB 190203A (Lien , et al., GCN 23845) with
Zeiss-1000 1-m telescope of Koshka Observatory starting on Feb. 03 (UT)
16:01:10 in R-filter under not optimal weather conditions. We do not
detect the optical afterglow candidate (Lien , et al., GCN 23830).
Preliminary photometry of the combined of first 4 images of 4*180
seconds started on 2019-02-03 16:01:10 is R=19.5. Observation is continuing.
The photometry is based on several nearby USNO-B1.0 stars.
[GCN OPS NOTE(03feb19): Per author's request, a typo in the first time
specification has been changed from "02:40:34" to "16:01:10".]