TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4731 SUBJECT: GRB 060210 : Xinglong and Lulin optical limit DATE: 06/02/10 12:09:44 GMT FROM: Yuji Urata at RIKEN W. Zhou (BAO), C.S. Lin (NCU) Y. Urata (RIKEN), K.Y. Huang (NCU) and Y. Qiu (BAO) on behalf of RAFON report: "The 0.8-m telescope at Xinglong Observatory, China and 1.0-m telescope at Lulin Observatory, Taiwan started to observe GRB 060210 afterglow (Fox et al. # 4723; Li #4725) at 10.73 UT (~ 5.75 hours after burst) and 11.07 UT (~6.08 hours), respectively. No source was detected at afterglow position of our R and I images. Compare with USNO-B1.0, 3-sigma limiting magnitude are summarized as below : Delay time (hour) Filter Exp. limit site Mean time (SN=3) --------------------------------------------------------------------- 5.79 R 600s x 1 19.5 Xinglong 5.97 I 600s x 1 18.7 Xinglong 6.18 R 300s x 3 20.8 Lulin 6.46 I 300s x 3 20.0 Lulin This message may be cited."