[vsnet-grb-info 18594] GRB 161014A: TSHAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20042
SUBJECT: GRB 161014A: TSHAO optical observations
DATE:    16/10/15 00:07:46 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 GRB 161014A  (Racusin et al., GCN 20035)  with 
Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory. 
We obtained several images in R filter starting on Oct. 14 (UT) 
13:48:35. We detected the afterglow of GRB 161014A (Morita et al., GCN 
20036; Guidorzi et al., GCN 20037; Xin et al., GCN 20038). Preliminary 
photometry of  of combined the first observational set is following

Date       UT start   t-T0   Filter   Exp.   OT   Err.  UL
                       (mid, days)     (s)
2016-10-14 13:48:35   0.07046  R      21*120 19.0 0.10  20.6

Photometry is based on nearby SDSS-DR9 stars (Lupton transformations):
SDSS-DR9_id         R(Lupton)

J221053.78+072643.3    14.88
J221018.77+072726.4    14.05
J221023.66+073006.3    15.49
J221024.28+072335.5    15.75
J221050.55+072341.7    17.10