TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3040 SUBJECT: GRB 050219a: Refined XRT position DATE: 05/02/19 23:29:58 GMT FROM: David Burrows at PSU/Swift K. L. Page, M. R. Goad, O. Godet, J. P. Osborne, (U. Leicester), M. Perri (ASDC), J. L. Racusin, D. N. Burrows, (PSU), C. Pagani, G. Tagliaferri (INAF-OAB), V. Mangano (INAF-IASF/Palermo), K. Hurley (UC-Berkeley), N. White, N. Gehrels (GSFC), B. Zhang (U. Nevada), report on behalf of the Swift XRT team: We report a refined XRT position for GRB 050219a (Romano et al. 2005, GCN 3036; Hullinger et al. 2005, GCN 3038), based on ground-processing of XRT Photon-Counting mode data taken during the first orbit after the burst. The refined position is: RA(J2000) = 11:05:38.8, Dec(J2000) = -40:40:58.3. We estimate an uncertainty of about 6.3 arcseconds. The lightcurve of this burst is fading, with a steep power-law up to about 200 s post-burst and a shallower power law at later times. Swift observations of this burst ended at 21:05:36.00 UT, when the Swift BAT triggered on GRB 050219b, which replaced GRB 050219a as the new GRB target in the on-board schedule.