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
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