TITLE: GCN CIRCULAR NUMBER: 15537 SUBJECT: GRB 131128A: Nanshan afterglow confirmation DATE: 13/11/28 17:21:23 GMT FROM: Dong Xu at DARK/NBI D. Xu (DARK/NBI), H.-B. Niu, J.-Z. Liu, G.-J. Feng, C.-H. Bai, A. Esamdin, L. Ma (XAO) report: Continued observations of GRB 131128A, 120s each for the beginning and 240s each for the subsequent all in R-band, at the Nanshan observatory show that the afterglow candidate in Xu et al (GCN 15535) has decayed by more than 1 magnitude at 1.95 hr after the Swift trigger, calibrated with the same nearby SDSS stars. The initial magnitude is R~19 mag in GCN 15535. We thus conclude that this object is the optical afterglow of GRB 131128A.