TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4344 SUBJECT: GRB 051211a: RTT150 optical observations DATE: 05/12/12 23:40:20 GMT FROM: Irek Khamitov at TUG R. Zhuchkov, I. Bikmaev, N. Sakhibullin (KSU/AST) R. Burenin, M. Pavlinsky, R. Sunyaev (IKI) I. Khamitov, Z. Aslan (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.), report: The error radius of GRB 051211a (Atteia et al, GCN4324) was observed with Russian-Turkish 1.5-m telescope (RTT150, Bakyrlytepe, TUBITAK National Observatory, Turkey), starting at Dec. 11, 18:38UT, i.e. ~15.8 hours after the burst. Two frames (300s exposures in R and B bands) were taken. We did not detect new sources to compare with DSS frames. Using USNO-B1 stars we estimate limiting magnitude of our images as: t-t0 Band m_lim (hour) (mag) ---------------------- 15.84 R 20.60 15.99 B 20.57 This message may be cited.