TITLE: GCN CIRCULAR NUMBER: 22320 SUBJECT: GRB180111A: Xinglong TNT possible optical detection DATE: 18/01/11 23:20:38 GMT FROM: L.P. Xin at NAOC L. P. Xin, C. Liu, J. Y. Wei, Y. L. Qiu, J. S. Deng, J. Wang, X. H. Han, X. M. Meng and C. Wu report: We began to observe GRB 180111A (Lien et a l., GCN22318) with Xinglong 0.8-m TNT telescope at 2018-01-11, 14:43:34(UT), about 93 sec the burst. We obtained several white and R-band images. In any single white band frame, no any new optical transient was detected within UVOT circle and XRT circle (Lien et a l., GCN22318, Evens et al., GCN 22319) down to 18.5 magnitude at the mid time of 113 sec after the burst . However, there is a marginal source in the 20*20sec coadded image within the XRT circle (Evens et al., GCN 22319), whose position is consistent with the location of the reported optical counterpart (Lien et a l., GCN22318). The brightness is about 20.0+/-0.3 calibrated by the local USNO B1.0 R2 mag at the mid time of 300 sec after the burst. We are making further analysis for the possible low S/N detection since there is a bright star near the GRB location. The message may be cited. [GCN OPS NOTE(11jan18): The latter 'A' was added to the GRB name in the Subject-line.]