PAHFIT models of rest-frame templates, with residuals plotted (straddling the dotted black line at L_ν = 0). The top panel corresponds to the most luminous template, and the luminosity decreases towards the bottom panel. Green and blue curves show the narrow-line and PAH features, respectively. Magenta is the continuum fit, and red is the total model. Note the absence of PAH features in the top panel, and that the 10 and 18 μm features only become visible in the top panel.