TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4930 SUBJECT: GRB 060323: Early optical observation at Xinglong DATE: 06/03/27 19:30:23 GMT FROM: W.K. Zheng at NAOC W.K. Zheng, M.Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu and J.S. Deng, report on behalf of the Xinglong GRB follow-up team: We have imaged the field of GRB 060323A with the 0.8m telescope at Xinglong Observatory.The first image was taken at 14:41:05 UT, approximately 540s after the BAT trigger.Preliminary analyses reveal a clear object at the position reported in GCN 4911. The unfiltered brightness reached a peak of about 18.2 mag about 640s after the trigger and showed a steady decay between about 710s and 3300s. R-band magnitudes from USNO A2.0 were used to calibrate our observations. We imaged the field again at Mar 25 12:15:54 UT,about 2 days after the burst. No obvious source was detected at the same position up to a 3-sigma limit of about 20.2 mag. Further analysis is under progress. This message may be cited.