[vsnet-grb-info 17038] GRB 150910A: TSHAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18319
SUBJECT: GRB 150910A: TSHAO optical observations
DATE:    15/09/16 11:35:17 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

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

We observed the field of GRB 150910A (Pagani et al., GCN  18264)  with 
Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory on 
Sep. 11 and Sep. 12.  We obtained several images in R filter.  The 
afterglow  (Pagani et al., GCN 18264; Zheng & Filippenko, GCN 18265) is 
clearly visible in a combined image on Sep. 11 and on Sep. 12 we 
obtained upper limit.  The photometry of the combined images are following

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

2015-09-11 18:39:41    1.38753  R       16*300   21.87    0.10
2015-09-12 19:03:44    2.39553  R       21*300   >22.3   (3 sigma)

The photometry is based on SDSS stars used in GCN 18281 (Mazaeva et al.)