Galaxy number counts in the UVOT u filter (red triangles). U number counts from Capak et al. (2004; green diamonds), Eliche-Moral et al. (2006; blue X's), and Metcalfe et al. (2001; black circles), as well as SDSS u number counts from Yasuda et al. (2001; cyan plus signs) are also plotted with a conversion to the UVOT u filter as described in the text. Yasuda et al. (2001) and Metcalfe et al. (2001) do not tabulate their errors. Model number counts are also plotted for a starburst template galaxy and Calzetti et al. (1994) dust model with A _V = 1, and galaxy luminosity function parameters from Ilbert et al. (2005) are shown in black for non-evolving (solid line) and an evolving (dashed line) galaxy luminosity functions. Model number counts assuming the cosmic spectrum of Baldry et al. (2002) as a template are shown in red for both non-evolving (solid line) and evolving (dashed line) luminosity functions.