GCN Circular 5245
A. J. Blustin (UCL-MSSL) and P. Schady (UCL-MSSL) report on behalf of the Swift/UVOT team: Due to a moon constraint, Swift/UVOT did not begin observing the field of GRB060602A until 15:55:25 on 2006-06-04, 1.766 days after the BAT trigger (Schady et al., GCN 5196). We observe no optical/UV afterglow candidate within the refined BAT error circle (Sakamoto et al. 5206) or at the position of the afterglow candidate reported by the NOT team (Jensen et al., GCN 5203). 3-sigma magnitude upper limits, in coadded images, at the position of the NOT afterglow candidate are as follows: Filter T_range(days) Exp(s) 3sig_UL(mag) V 1.831-3.555 1775 21.3 B 1.827-3.567 1572 22.3 U 1.826-3.564 1775 22.1 UVW1 1.766-3.561 1850 21.7 UVM2 1.832-3.558 1922 22.0 UVW2 1.828-3.617 2265 22.3 Where the time range of the images post-trigger is given in days. The upper limits are not corrected for Galactic extinction.