TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4326 SUBJECT: GRB 051211: Swift XRT upper limit DATE: 05/12/11 19:32:52 GMT FROM: David Burrows at PSU/Swift G. Cusumano (INAF-IASF), D.N. Burrows, S. Hunsberger, C. Pagani (PSU), V. La Parola, and V. Mangano (INAF-IASF) report on behalf of the Swift XRT team: The Swift XRT began observing HETE-discovered GRB 051211 (Atteia et al., GCN 4324) at 14:43:21 UT on 11 December 2005. In the first two orbits we accumulated 3330 s of exposure time. We find no X-ray counterpart within the HETE/SXC error circle, with a 3 sigma upper limit of 3.19E-3 counts/s (2.0 E-13 erg/s/cm/cm). We note that this is considerably fainter than the typical Swift afterglow at this same time frame, though not inconsistent with the fainter Swift afterglows (Nousek et al. 2005, astroph/0508332). Observations will be terminated at about 19:30 UT on 11 December to prevent overheating of the XRT detector.