TITLE: GCN CIRCULAR NUMBER: 14008 SUBJECT: GRB 121128A: FTN optical afterglow confirmation DATE: 12/11/28 07:11:25 GMT FROM: Jure Japelj at U. of Ljubljana,Slovenia J. Japelj (U. Ljubljana), N.R. Tanvir (U. Leicester), C. Guidorzi (U. Ferrara) report on behalf of a large collaboration report: The 2-m Faulkes Telescope North automatically began observing GRB 121128A (Oates et al. GCN Circ. 14007) on November 28 2012, 05:07:51 UT corresponding to 134 seconds post burst trigger. We confirm the presence of a fading source at the optical afterglow candidate position reported by Oates et al. GCN Circ. 14007. In the first 10 s exposure, we measure a preliminary R magnitude of 14.5 +- 0.1, calibrated against nearby USNO-B1 stars. The candidate was discovered automatically by the LT-TRAP pipeline.