Luminosity functions of DA white dwarfs for several mass cuts. See text for details. The solid line with filled squares represents the original Krzesinski et al. (2009) DA white dwarf luminosity function, the dashed line with empty squares is our simulated luminosity function, and the dotted line with filled triangles is the Krzesinski et al. (2009) DA luminosity function with our mass adjustments as described in the text.