Normalized distribution of the reduced proper motions of our targets (white are the published HW Vir systems, gray the ATLAS targets, and black the OGLE targets). Superimposed are the reduced proper motions of the objects with a white dwarf probability greater than 90% from the Gaia white dwarf catalog (Gentile Fusillo et al. 2019), shown with the red dashed line. The green dotted line shows the subsample of the targets with spectral classification from SDSS spectra. The red line marks our reduced proper motion cut of H_G <  14.5; at higher values, targets are less likely to be hot subdwarfs.