TITLE:   GCN CIRCULAR
NUMBER:  23638
SUBJECT: GRB 190106A : continued TSHAO optical observations
DATE:    19/01/07 23:21:36 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

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

We continue the observations of  the optical afterglow (e.g. Lipunov  et al. 
GCN 23616, Itoh et al. GCN 23617, Mao et al. GCN 23618, Reva et al., GCN 
23620, Xin et al. GCN 23622, Quadri et al. GCN 23624, Hu et al. GCN 23627) 
of  the GRB 190106A (Sonbas et al., GCN 23615) with Zeiss-1000  telescope of 
Tien Shan Astronomical Observatory.
We obtained several images in R-filter starting on Jan. 7  (UT) 12:57:20.
Preliminary photometry of the afterglow  is R= 20.07 +/- 0.06  at (UT, mid 
time) 13:40:10 which is compatible with the photometry reported  in GCN 
23636 (Zhu et al.) The photometry is based on nearby USNO-B1.0 stars.