P. Brown (PSU), A. Retter (PSU), P. Schady (MSSL), P. Roming (PSU), C.
Gromwall (PSU), N. Cucchiara (PSU), P. Boyd (GSFC), K. Mason (MSSL), N.
Gehrels (GSFC), on behalf of the Swift UVOT team
The Swift Ultra-Violet/Optical Telescope (UVOT) began observations of
GRB050603 on June 3, 2005 at 15:42:59 UT, ~9 hours after the initial Swift
BAT trigger (Retter et al, GCN 3509). The observations were delayed
because automated slewing was not enabled during engineering tests at the
time of the burst. A fading source is detected in the V band at the
afterglow position first reported by Berger & McWilliam (GCN 3511). The
coordinates of this source are
Ra, Dec = 02:39:56.839, -25:10:54.92
Astrometry was performed using reference stars from the GSC.
Magnitudes from the two long exposures are as follows:
Filter Magnitude Duration(s) T_start(s)
V 18.2 +/- 0.12 1298 32997
V 21.8 +/- 0.4 2103 38782