Comparison of velocity dispersion measurements of the MUSE sample using full E-MILES, sMILES, and XSL SSP libraries vs. the same libraries after applying cuts on age and metallicity of the templates. The top panel shows the ratio of velocity dispersion measurements using the ‘full’ and ‘cut’ SSP libraries. The blue (E-MILES), green (XSL), and red (sMILES) markers show the ratio for individual galaxies, and the dashed lines represent the sample average for each library. In almost all cases, the effect of the cut is sub-percent. The three panels at the bottom show the age and metallicity of the templates selected by pPXF to fit our spectra, and they correspond to XSL, E-MILES, and sMILES SSP libraries from left to right. The red circles and blue squares are for ‘full’ and ‘cut’ libraries, respectively, where the size of the marker in each panel is proportional to how many times the corresponding template was used. The black dashed lines show the age and metallicity restriction applied to the ‘cut’ libraries. For E-MILES and sMILES, in general, the same templates were selected with similar frequency regardless of which version of the corresponding library was used. As a result, the ratios for individual galaxies (blue and red circles on the top panel) are very close to 1 for almost all galaxies. For XSL, the difference in velocity dispersions from ‘full’ and ‘cut’ libraries are somewhat higher compared to the other two libraries, but still well below our target of 1%.