TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4960 SUBJECT: GRB 060413: Watcher UBVR observations DATE: 06/04/14 00:25:16 GMT FROM: Petr Kubanek at AIO J.French, G.Melady, L.Hanlon, B.McBreen, S.McBreen (University College Dublin, Ireland), P.Meintjes, M.Hoffman, H.Calitz (University of the Free State, South Africa), N.Smith (Cork Institute of Technology,Ireland), M.Jelinek, A. de Ugarte Postigo, A.J. Castro-Tirado (IAA, Granada), R.Hudec (ASU AV CR Ondrejov) and P.Kubanek (ASU AV CR Ondrejov & ISDC, Versoix) reports under control of RTS2, and using JIBARO astrometry package, Watcher telescope, located at Boyden Observatory, South Africa, observed XRT location of GRB 060413 (GCN 4958). Observation at UBVR filters started at high airmass at 23:10 UT, e.g. 4 h 13 m after GRB. Preliminary analysis of single 60 seconds R exposure doesn't shown any new object down to 16.5 magnitude. Observation is continuing. Watcher telescope is currently in commissioning phase. This message can be quoted.