TITLE: GCN CIRCULAR NUMBER: 7151 SUBJECT: GRB 071227: Magellan observations DATE: 07/12/28 05:54:17 GMT FROM: Edo Berger at Princton U E. Berger (Princeton), N. Morrell and M. Roth (LCO) report: "We observed the position of GRB 071227 (GCN #7148) with the IMACS instrument on the Magellan/Baade telescope starting on 2007 Dec. 28 at 03:52 UT (7.7 hours after the burst). In a 300-sec R-band exposure we detect a single galaxy within the XRT error circle, coincident with the position of the UVOT source (GCN #7150). This object is also visible in the DSS. The galaxy has spiral, edge-on morphology, and a total magnitude of R=19.3 mag. There are no other sources within the XRT error circle to a 3-sigma limiting magnitude of R~22.3 mag."