Test sample of hot sds, WDs, CVs, and OBs having 2mass+galex+SuperCOSMOS data. Note that those hot sds with FUV₀ − NUV₀ > 2 all have a FUV magnitude above 18.7, close to or above the limiting magnitude, which is causing their red appearance. The black dashed box comprises objects within the galex-2mass selection limits given by Rhee et al. (2006). The red dashed box gives selection limits proposed in this work. See text and Table 2 for further details.