TITLE:   GCN CIRCULAR
NUMBER:  18949
SUBJECT: GRB 160127A: Khureltogot optical observations
DATE:    16/01/29 11:37:43 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

E. Mazaeva (IKI), S. Schmalz (AIP), A. Volnova (IKI),  N. Tungalag 
(Research Center of Astronomy and Geophysics MAS),   I. Molotov (KIAM), 
  A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:

We observed the field of Swift GRB 160127A (Amaral-Rogers et al., GCN 
18938) with ORI-40 telescope of Khureltogot observatory starting on 
Jan., 27 (UT) 19:32:48.  We marginally detect optical afterglow 
(Amaral-Rogers et al., GCN 18938; Klotz et al., GCN 18939; Cucchiara et 
al., GCN 18941). Preliminary photometry of the afterglow is following


Date UT start       t-T0   Filter Exp.   OT   Err   UL(3sigma)
                     (mid, days)   (s)

2016-01-27 19:32:48 0.48499 none  90*60 21.0  0.35  21.0
2016-01-27 21:10:18 0.55333 none  89*60 n/d   n/d   21.2

Photometry is based on nearby SDSS stars, R magnitude deduced from 
Lupton's transformations.

SDSS_DR9_id         R(Lupton)
J150358.16+000929.4 16.36
J150406.02+000738.4 16.03
J150341.40+000835.8 15.17
J150334.55+000806.9 16.20
J150334.11+000513.3 17.32