[vsnet-grb-info 18487] GRB 160910A: TSHAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19935
SUBJECT: GRB 160910A: TSHAO optical observations
DATE:    16/09/18 20:03:32 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

E. Mazaeva (IKI), A. Kusakin (Fesenkov Astrophysical Institute), I. Reva 
(Fesenkov Astrophysical Institute), A. Volnova (IKI), A. Pozanenko (IKI) 
report on behalf of larger GRB follow-up collaboration:

We observed the field of the GRB 160910A (Veres et al., GCN 19901; 
Racusin et al., GCN 19902) with Zeiss-1000 (East) 1-m telescope of Tien 
Shan Astronomical Observatory.  We obtained several images in R filter 
starting on Sep., 12 and Sep., 15. We clearly detected optical afterglow 
(Ugarte Postigo et al., GCN 19907; Malesani et al., GCN 19908; Lipunov 
et al., GCN 19914). Preliminary photometry of the afterglow is following

Date UT start t-T0 Filter Exp. OT UpLim (3 sigma)
                          (mid, days) (s)
2016-09-12 14:43:02 1.92176 R 27*120 19.96 +/- 0.08 21.7
2016-09-15 14:31:13 4.91356 R 27*120 21.70 +/- 0.30 21.7

Photometry is based on nearby SDSS-DR9 stars used in GCN 19919 (Mazaeva 
et al.).