TITLE: GCN CIRCULAR NUMBER: 18954 SUBJECT: GRB160131A: Xinglong TNT optical observation DATE: 16/01/31 11:02:19 GMT FROM: L.P. Xin at NAOC L. P. Xin, X. F. Wang, J. Y. Wei, Y. L. Qiu, J. S. Deng, X. M. Meng D. Xu, J. Wang, X. H. Han and C. Wu on behalf of EAFON report: We observed GRB 160131A (Page et al. GCN 18951) with Xinglong 0.8-m TNT telescope at 10:22:09UT, about 2 hours after the burst. The optical afterglow (Page et a.., GCN 18951, YurKov et al., GCN 18952) was detected in our white, B, and R, I-band images. The brightness of the optical afterglow is about 16.1 mag at the mid time of 118 min afer the burst, calibrated by the USNO B1.0 star (RA=05:12:39.8 DEC=-7:02:02 R2=15.51mag). The message may be cited.