Luminosity of the model [O I] (top), [O II] (second row), [O III] (third row), and O I (bottom) lines in units of the observed line luminosities and limits for SN 2012au at one year for a pure oxygen composition at three different values of T_PWN. The green circled points represent where the model and observed values are within a factor of 2, the purple circles within a factor of 5, and the gray shaded region also within a factor of 5. The black circled points (for [O II] and [O III]) represent where the model luminosity is more than a factor of two higher than the observational limit.