TITLE: GCN CIRCULAR NUMBER: 11521 SUBJECT: GRB110106A: Xinglong TNT upper limit DATE: 11/01/06 17:05:02 GMT FROM: L.P. Xin at NAOC L.P. Xin, Z. X. Ling, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng, C. Wu, X. H. Han on behalf of EAFON report: We began to observe GRB110106A (Mangano et al., GCN 11520 ) with Xinglong TNT telescope at 15:35:15.946 (UT), 10min after the burst. A series of white and R-band images were obtained. No any new source was found within the errorbox of X-ray counterpart (Mangano et al., GCN 11520 ), down to 3 sigma upper limit of R~19.8 mag at the mean time of 11 min after the burst. This message may be cited. For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/