TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4947 SUBJECT: GRB060403: Swift XRT refined position DATE: 06/04/03 18:37:52 GMT FROM: Vanessa Mangano at INAF-IASFPA V. Mangano (INAF-IASFPA), J. Kennea (PSU), V. La Parola, T. Mineo, G. Cusumano (INAF-IASFPA), D.N. Burrows (PSU), P. Boyd (NASA/GSFC) on behalf of the Swift XRT team We analysed 840 s exposure in Photon Counting mode from the first orbit of the Swift observation of GRB060403 (Boyd et al. 2006, GCN 4945). The refined coordinates of the X-ray source are: RA(J2000) = 18 49 21.8 Dec(J2000) = +08 19 45.3 with an estimated uncertainty of 5.5 arcseconds radius (90% containment). This position is 11 arcseconds from the preliminary position given in GCN 4945. The X-ray light curve shows a standard afterglow decay. Further analysis is on-going. This circular is an official product of the Swift XRT team.