TITLE: GCN CIRCULAR NUMBER: 3283 SUBJECT: GRB 050416b: LCO observations DATE: 05/04/17 03:10:08 GMT FROM: Edo Berger at Carnegie Obs E. Berger, J. Mulchaey (Carnegie Observatories), N. Morrell, and W. Krzeminski (LCO) report: "We imaged the BAT error circle of GRB 050416b (GCN 3279) with the Swope 40-inch telescope (r-band) and the du Pont 100-inch telescope (I-band) at LCO starting on 2005, April 17.001 and 17.002 UT, respectively (86 and 114 min after the burst). We also obtained a 5-minute image with IMACS on the Magellan/Baade telescope in R-band. A comparison to DSS reveals no new sources to the depth of the survey in any of our images."