TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3114 SUBJECT: GRB 050318: Magellan optical afterglow identification DATE: 05/03/19 00:53:46 GMT FROM: Edo Berger at Carnegie Obs John Mulchaey and Edo Berger (Carnegie Observatories) report: "On 2005, March 18.995 UT we imaged the BAT error circle of GRB 050318 (GCN 3111) with IMACS on the Magellan/Baade telescope in the R-band. Within the 6" radius XRT error circle (GCN 3113) we find a single bright object which is not present in the DSS at coordinates (J2000): RA = 03:18:51.0 DEC = -46:23:44 with an uncertainty of about 0.5" in each coordinate. We consider this object to be the optical afterglow of GRB 050318." [GCN OPS NOTE (19Mar05): Changed the Subject-line from "030518" to "050318".]