TITLE: GCN CIRCULAR NUMBER: 11528 SUBJECT: GRB110106B: Xinglong TNT upper limit DATE: 11/01/06 23:53:06 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 GRB110106B ( Sbarufatti et al., GCN 11525 ) with Xinglong TNT telescope at 21:35:02.5(UT), 9min 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 ( Sbarufatti et al., GCN 11525 ), down to 3 sigma upper limit of R~20 mag at the mean time of 14 min after the burst. This message may be cited. Thanks to the help of TNT observation assistant for this work. For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/