TITLE: GCN CIRCULAR NUMBER: 17169 SUBJECT: GRB141212A: xinglong TNT upper limit DATE: 14/12/12 21:58:48 GMT FROM: L.P. Xin at NAOC L. P. Xin, T. M. Zhang, J. Y. Wei, Y. L. Qiu, J. S. Deng, J. Wang, X. H. Han and C. Wu on behalf of EAFON report: We began to observe GRB 141212A (Ukwatta eta l., GCN 17158) with Xinglong 0.8-m TNT telescope at 2014-12-12, 12:14:40(UT), about 39 sec the burst. In any single W-band frame or coadded image, no any new optical transient was detected within XRT circle (Ukwatta eta l., GCN 17158; Osborne et al, GCN 17164 ) down to 3 sigma limit of R~20 mag at the mid-time of 4 min after the burst, calibrated by the nearby USNO B1.0 R2 mag. The message may be cited.