GCN Circular 17102
E. Mazaeva (IKI), E. Klunko (ISTP), I. Korobtsev (ISTP), M. Eselevich (ISTP), A. Volnova (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 AZT-33IK telescope of Sayan observatory (Mondy) on Nov., 26 starting on (UT) 20:16:58. 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 stars: date UT start t-T0 Filter Exp. OT OT_err (mid, days) (s) 2014-11-26 20:16:58 5.7120 R 39*120 21.38 0.09 The magnitude of the afterglow decreased about 0.9 mag since our previous observation (Mazaeva et al., GCN 17093) at 2.74 days after the burst trigger and thus we confirm gradual steepening of the afterglow light curve (Butler et al., GCN 17101).