GCN Circular 6136
A. C. Gupta National Astronomical Observatories/Yunnan Observatory CAS, P.O. Box 110, Kunming, Yunnan 650011, China We observed the field of GRB 070223 (GCN 6125) with CCD detector at our 1.02 meter telescope of the Yunnan observatory, Kunming, China. We started our observation on Feb. 23, 2006 at UT 13:21:20. We took 5 image frames of 200 seconds exposure time of each in the optical R passband. There is no detection of optical afterglow candidate in our combined 5 images. The 5-sigma limiting magnitude of our observations is R ~ 20.0 mag.