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GCN Circular 18992

Subject
GRB 160131A: TSHAO optical observations
Date
2016-02-05T18:49:47Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Volnova 
(IKI), A. Kusakin (Fesenkov Astrophysical Institute),  A. Pozanenko 
(IKI) report on behalf of larger GRB follow-up collaboration:

We observed the Swift GRB 160131A (Page et al., GCN 18951) with 
Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory 
starting on Feb. 05 (UT) 14:22:45.  We obtained several images in R 
filter. We clearly detect optical afterglow (Page et al., GCN 18951; 
Yurkov et al., GCN 18952; Guidorzi et al., GCN 18953; Xin et al., GCN 
18954; Xin et al., GCN 18955; Watson et al., GCN 18956) in a combined 
image. Preliminary photometry is following


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


2016-02-05  14:22:45   5.28802 R       21*300  22.40  0.20

Photometry is based on nearby USNO-B1.0 stars

USNO-B.1_id  R2

0829-0078223 15.70
0829-0078147 14.56
0829-0078167 17.71
0829-0078222 18.96
0829-0078226 18.69
0829-0078129 17.62
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