TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4343 SUBJECT: GRB051211B, RBO optical observations DATE: 05/12/12 22:27:58 GMT FROM: Chris Rodgers at U of Wyoming D. Allen, C. Rodgers, R. Canterna (University of Wyoming) report on behalf of the Red Buttes Observatory (0.6m) GRB Team as part of the FUN GRB Collaboration. We responded to GRB 051211B (INTEGRAL trig. 2712; Mereghetti et al, GCN4327) at 2005/12/12 00:59:37 UT with two 10 minute I and R exposures centered on the position of the original INTEFRAL GRB Position under 4.6 arcsecond photometric conditions. The source was not detected in any of the above exposures in the same position reported by Klotz et al. (GCN 4328) due to detection limits. UT Time Since Filter Limiting Magnitude 00:59:37 2.8981 hrs I 18.4 01:10:21 3.0769 hrs I 18.4 01:33:40 3.4656 hrs R 19.2 01:44:15 3.6419 hrs R 19.2 10 sigma limiting magnitude were derived from the USNO-B1.0 catalogue. This message may be cited.