[vsnet-grb-info 15829] GRB 141121A: TSHAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17117
SUBJECT: GRB 141121A: TSHAO optical observations
DATE:    14/11/29 18:03:22 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

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

We observed the field of GRB 141121A (Lien et al., GCN 17075)
with  Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical
Observatory  starting on Nov. 26 (UT) 22:12:24.  We obtained several 
images in R-filter. In a combined image we clearly  detect optical 
afterglow (Tanga et al., GCN 17078; Perley et al., GCN 17081).

A preliminary photometry is based on nearby SDSS DR9 stars:

date       UT start   t-T0      Filter  Exp.    OT    OT_err
                      (mid, days)        (s)

2014-11-26 22:12:24   5.8118    R       14*300  21.48 0.09