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GCN Circular 23620

Subject
GRB 190106A : TSHAO optical observations
Date
2019-01-06T15:27:05Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
I. Reva (FAPHI), A. Pozanenko (IKI),
  A. Kusakin (FAPHI), S. Belkin (IKI), A. Volnova (IKI),  E. Mazaeva 
(IKI), M. Krugov (FAPHI) report on behalf of larger GRB follow-up 
collaboration:

We observed the optical transient (Yurkov et al., GCN 23614; Sonbas et 
al., GCN 23615; Lipunov et al., GCN 23616; Itoh et al., GCN 23617) of 
GRB 190106A (Sonbas et al., GCN 23615) with Zeiss-1000 1-m telescope of 
Tien Shan Astronomical Observatory starting on Jan. 6 (UT) 13:45:42. 
Preliminary photometry of the object in the beginnig of observations is 
R= 16.23 +/- 0.05, and the optical transient is faded as R= 17/5 +/- 0.1 
at (UT) 14:24:04. (The photometry is based on nearby USNO-B1.0 stars). 
Observations are continuing in R and B - filters.
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