TITLE: GCN CIRCULAR NUMBER: 6680 SUBJECT: GRB 070729: Magellan NIR Observations DATE: 07/07/29 08:20:29 GMT FROM: Edo Berger at Carnegie Obs E. Berger (Carnegie Observatories) and D.L. Kaplan (MIT) report: "Starting on July 29.315 UT we observed the XRT position of the short burst GRB 070729 (GCN #6678) with Persson's Auxiliary Nasmyth Infrared Camera (PANIC) on the Magellan/Baade 6.5-m telescope. A total of 6 min were obtained in the Ks band in 0.55" seeing. We find a single, extended object within the XRT error circle with Ks ~ 18.2 mag, located at: RA = 03:45:15.52 DEC = -39:19:28.7 No point sources are visible within the XRT error circle to a 3-sigma depth of about 21.3 mag. Further observations are in progress."