TITLE:   GCN CIRCULAR
NUMBER:  23843
SUBJECT: GRB 190202A: TSHAO optical observations
DATE:    19/02/03 11:14:49 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

S. Belkin (IKI), I. Reva (FAPHI), A. Pozanenko (IKI), E. Mazaeva (IKI), 
A. Volnova (IKI), A. Kusakin (FAPHI), M. Krugov (FAPHI) report on behalf 
of IKI-GRB-FuN collaboration:

We observed the afterglow of GRB 190202A (Lien et al., GCN 23830; 
Novichonok et al., GCN 23831; Evans et al., GCN 23832; Steeghs et al., 
GCN 23833; Kuin et al., GCN 23834; Verrecchia et al., GCN 23835; 
Markwardt et al., GCN 23836; Veres et al., GCN 23838; Cucchiara et al., 
GCN 23839; Lien et al., GCN 23840; Paek  et al., GCN 23841; Malesani et 
al., GCN 23842) with Zeiss-1000 1-m telescope of Tien Shan Astronomical 
Observatory starting on Feb. 02 (UT) 21:04:32.   Preliminary photometry 
of the field is following.

Date       UT start t-T0    Filter Exp.   OT    Err.  UL
                     (mid, days) (s)

2019-02-02 21:04:32 0.82502 R      21*120 20.43 0.11  21.6

The photometry is based on nearby USNO-B1.0 stars