TITLE:   GCN CIRCULAR
NUMBER:  19925
SUBJECT: GRB 160910A: Maidanak optical observations
DATE:    16/09/16 12:20:32 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

E. Mazaeva (IKI), A. Pozanenko (IKI), B. Hafizov (UBAI). A. Volnova 
(IKI), O. Burhonov (UBAI) report on behalf of larger GRB follow-up 
collaboration:

We observed the  GRB 160910A (Veres  et al., GCN 19901; Racusin et al., 
GCN 19902) with AZT-22 telescope of Maidanak observatory equipped with 
SNUCAM in R filter. We  clearly detected optical afterglow (de Ugarte 
Postigo et al., GCN 19907; Malesani et al., GCN  19908; Lipunov et al., 
GCN  19914; Mazaeva et al., GCN  19919; Hagen et al., GCN 19923). 
Preliminary photometry  of the afterglow is following


Preliminary photometry of the afterglow  is following

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

2016-09-14   14:40:40  3.89933  R        15*120   21.40  0.14   22.2


Photometry is based on nearby SDSS-DR9 stars
SDSS-DR9_id    R(Lupton transformation)
J144549.10+390403.4    16.86
J144552.78+390234.9    17.32
J144538.58+390535.0    18.34
J144541.35+390128.0    17.15