[vsnet-grb-info 15741] GRB 141031B: TShAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17029
SUBJECT: GRB 141031B: TShAO optical observations
DATE:    14/11/05 19:27:48 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

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

We observed the field of the GRB 141031B (Gompertz et al., GCN 16998)
with  Zeiss-1000 (East) 1m telescope of Tien Shan Astronomical
Observatory on Oct., 31  starting on (UT) 15:39:02.  Within enhanced XRT 
error circle (Goad et al., GCN 17009)  we do not detect any object 
either in a single image (Mazaeva et al., GCN 17007) or   in combined 
image of a total exposure of 4800 s.
Details of the photometry are following:

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

2014-10-31 15:39:02   0.03284    R         600  21.5
2014-10-31 15:39:02   0.05837    R       8*600  22.3


The photometry is based on  following SDSS DR9 stars:

SDSS_id             R_Lupton err
J234748,81+411954,3 16.430 0.014
J234749,26+412154,3 16.866 0.014
J234741,02+411920,5 17.452 0.015