TITLE: GCN CIRCULAR NUMBER: 14201 SUBJECT: GRB 121128A: optical observations DATE: 13/02/13 16:37:16 GMT FROM: Alexei Pozanenko at IKI, Moscow Yu. Krugly (Institute of Astronomy of Kharkiv National University), R.Inasaridze, O. Kvaratskhelia(Abastumani Astrophysical Observatory), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift Swift GRB 121128A (Oates et al., GCN 14007)with AC-32 (0.7m Maksutov) telescope of Abastumani Observatory, starting on Nov. 28 (UT) 15:28. We took several unfiltered images of 300 s exposure. We detected the afterglow (Oates et al., GCN 14007; Japelj et al., GCN 14008) in stacked images. The photometry of a the stacked image is based on USNO-B1.0 stars (R2): Start, T0+, Filter, Exp., OT (UT) (mid),days 15:27:50 0.4479 none 9x300 20.24 +/- 0.12 16:18:59 0.4853 none 8x300 20.35 +/- 0.16 17:09:58 0.5208 none 8x300 20.38 +/- 0.18 18:01:17 0.5544 none 9x300 20.55 +/- 0.22 18:46:44 0.5871 none 8x300 20.84 +/- 0.36