Examples of different quality spectra with different S/N values. Shown is the relative flux on the y-axis and the wavelength on the x-axis (in angstroms). These spectra have not been shifted to the rest frame. The black line is the galaxy spectrum and the red line the fit produced by pPXF. The gray regions were manually masked out to improve the fit. From top to bottom are shown the spectra for the galaxies MATLAS-269, MATLAS-1232, and MATLAS-10 with S/N values of 8.7, 26.0, and 61.9, respectively.