TITLE: GCN CIRCULAR NUMBER: 6567 SUBJECT: GRB 070621: UVOT-enhanced XRT position DATE: 07/06/22 08:56:15 GMT FROM: Boris Sbarufatti at INAF-IASF-Pa B. Sbarufatti (INAF-IASF Pa), P. A. Evans (LU) report on behalf of the Swift team Using 746 s of overlapping XRT Photon Counting mode and UVOT V-band data, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 323.79225, -24.81752 which is equivalent to: RA (J2000): 21 35 10.10 Dec (J2000): -24 49 03.1 with an uncertainty of 2.0 arcsec (90% confidence).