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GCN Circular 17103

Subject
GRB 141121A: TSHAO optical observations
Date
2014-11-27T00:21:38Z (9 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@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 141121A (Lien et al., GCN 17075)
with  Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical
Observatory  starting on Nov. 22 (UT) 21:45:26.  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)

2014-11-22 21:45:26   1.8093    R       26*300  20.88  0.03
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