Left: same as Figure 7, but comparing the two-component Gaussian fits to the SE spectra of Shen et al. (2016b) to our GH polynomial fits to the coadded spectra (black histograms) and the SE spectra (red histograms). The length of the red arrows in the small top panels for each set of histograms represents the SE measurement uncertainties of the two-component Gaussian (Gs; top arrow) fits and the GH polynomial (GH; bottom arrow) fits, and the length of the black arrow also represents the measurement uncertainty of the SE measurements of the two-component Gaussian fits.