Theoretical WD isochrones. Upper panel: distribution of the evolving WD mass as a function of the m_F606W magnitude along the 8.5 Gyr isochrones with and without neon distillation. Solid black and dashed red lines denote calculations with the c07 and b20 opacities, respectively. Lower panel: same as the upper panel, but for the 8.0, 8.5, and 9.0 Gyr isochrones of Fig. 5, which all include neon distillation, calculated with either the c07 (solid lines) or b20 opacities (dashed lines).