TITLE: GCN CIRCULAR NUMBER: 17030 SUBJECT: GRB 141028A: TShAO optical observation DATE: 14/11/05 20:23:23 GMT FROM: Alexei Pozanenko at IKI, Moscow 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 GRB 141028A (Bissaldi et al., GCN 16969) with Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory on Oct., 29 starting on (UT) 15:58:47. We obtained several images in R-filter. In a combined image we clearly 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) 2014-10-29 15:58:47 1.2300 R 10*300 20.5 0.10 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