TITLE: GCN CIRCULAR NUMBER: 17035 SUBJECT: GRB 141028A: Mondy optical observations DATE: 14/11/07 08:08:50 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev (ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 141028A (Bissaldi et al., GCN 16969) with AZT-33IK telescope of Sayan observatory (Mondy) on Oct., 30 starting on (UT) 14:12:40. We obtained several images in R-filter. In a combined image we detect optical afterglow (Gorbovskoy et al., GCN 16972; Graham et al., GCN 16977). Details of the photometry are following: date UT start t-T0 Filter Exp. OT OT_err (mid, days) (s) 2014-10-30 14:12:40 2.1733 R 2520 21.66 0.22 The photometry is based on following SDSS DR9 stars: SDSS_id R_Lupton J213021,99-001255,7 15.503 J213030,76-001427,8 17.205 J213035,56-001205,6 16.620