Field of view for UVOT CDF-S observations. Contours indicate the area covered with at least 98% of the maximum exposure time as described in the text and tabulated in Table 1. The contours are uvw2 (thin solid line), uvm2 (dotted line), uvw1 (dashed line), and u (dot-dashed line). For reference, the extent of the CDF-S (Giacconi et al. 2002), Hubble Ultra Deep Field (Beckwith et al. 2006), and Great Observatories Origins Deep Survey (Giavalisco et al. 2004) are denoted by thick contours which are labeled.