Swift Observation of GRB 080603B.

BAT triggered on GRB 080603B at 19:38:13 UT (Trigger 313087) (Mangano et al., GCN Circ. 7794). This was a 0.512 sec rate-trigger on a intermediate length burst with T90 = 60 sec. Swift slewed to this burst immediately and XRT began follow-up observations at T + 61.8 sec, and UVOT at T + 63 sec. Our best position is the XRT location RA(J2000) = 176.53312deg (11h46m07.95s), Dec(J2000) = +68.06058deg (68d03′38.11′′) with an error of 3.7 arcsec (90% confidence, including boresight uncertainties).