Fits (red) to spectra (black) from the centre and outer regions (top and bottom of each pair of spectra, respectively) for our galaxy sample, as labelled on the right. Residuals are shown in green, offset for presentation. The grey bands show regions which are masked during the fit. All spectra are normalised, but vertically offset for presentation. It can be seen that the outer spectra are more noisy, as expected, but that in all cases the data are reproduced well by the fit.