GCN Circular 15535
D. Xu (DARK/NBI), H.-B. Niu, J.-Z. Liu, G.-J. Feng, C.-H. Bai, A. Esamdin, L. Ma (XAO) report: We observed the fields of GRB 131128A (Sonbas et al., GCN 15533), using the 1m telescope located on Mt. Nanshan, Xinjiang, China. Observations started 880s after the Swift trigger and a series of R-band frames were obtained. An optical source is clearly detected at coordinates: R.A. (J2000) = 23:41:13.75 Dec.(J2000) = +31:18:23.14 Error Radius: ~1 arcsec which is consistent with the SPER XRT position of this burst (http://www.swift.ac.uk/sper/), thus it's likely the afterglow of the GRB. Note that there is a very bright star (r=14.76 mag from SDSS) just a few arcsec away from this optical transient. Observations are ongoing.