TITLE: GCN CIRCULAR NUMBER: 15676 SUBJECT: GRB 131231A, Optical Observations DATE: 14/01/04 12:00:42 GMT FROM: Shashi Bhushan Pandey at ROTSE S.B. Pandey, Brajesh Kumar and Archana Soam (ARIES Nainital India, on behalf of larger Indian GRB collaboration) The Fermi-LAT detected GRB 131231A (Sonbas et al., GCN 15640; Xu et al., GCN 15641) was monitored with the 1.04m and 1.3m telescopes at ARIES Nainital starting at 2014-01-01 13:15:13 (UT). Several images in R_c and I_c pass-bands were obtained. The optical afterglow was clearly detected in individual frames. The preliminary photometry of the first R_c frame (exposure time 300 sec) yields afterglow magnitude to be 19.2+-0.1 mag. The nearby USNO stars have been used for calibrate. This massage may be cited.