GCN Circular 15655
D. Xu (DARK/NBI), X. Zhang, C.-H. Bai, H.-B. Niu, A. Esamdin, L. Ma (XAO) report: We observed the field of GRB 140102A (Hagen et al., GCN 15653) using the 1m telescope located on Mt. Nanshan, Xinjiang, China, equipped with a 1.2x1.2 deg^2 CCD camera. Observations started at 21:27:51 UT on 2014-01-02 (i.e., 614s after the BAT trigger). All frames are in R filter. We find a decaying afterglow at the UVOT position, beginning with R~16.3 mag at a mean time of 674s post-burst. The afterglow is decaying roughly as F(t) ~ t^-1 up to ~7000s post-burst, possibly with fluctuations in between. Observations are ongoing. Photometry is calibrated with nearby stars: SDSS J140740.98+011949.8 and SDSS J140742.47+012010.4.