Example of full spectral fitting applied to the central Voronoi bin of CAVITY 40288. In the top-left panel, we overplot to the observed spectrum (black) and the best fit from pPXF (green). The residuals of the fit (red) are compared to the propagated errors for the corresponding spectrum (blue) in the bottom-left panel. The right-hand panel shows a histogram of the ratio of the fitting residuals and the propagated errors including a Gaussian fit for this particular galaxy.