X-ray luminosity vs. proxies of intrinsic AGN luminosity. Blue diamonds represent the non-variable 12 μm sources, cyan diamonds illustrate the variable 12 μm sources, with the observed flux values from Table 4 for each source connected by a straight line, and red triangles denote the [O iii] sources. Error bars for the variable sources represent the upper error on the maximum X-ray flux and lower error on the minimum X-ray flux. Variable sources NGC 5506 and NGC 7172 do not have error bars plotted as they are smaller than the symbol size. The dashed line represents the relationship for Sy1s from (a) Heckman et al. (2005), slope = 1.4 dex with intercept −0.15 dex, (b) Diamond-Stanic et al. (2009), slope = 0.86 dex with intercept = 7.53 dex, and (c) Gandhi et al. (2009), slope = 0.85 dex with intercept 6.27 dex. In all cases, the majority of the Sy2s are below this relationship, illustrating that Sy2s have weaker X-ray emission than their Sy1 counterparts.