Radial profiles of LINER-ionised Hα flux. The coloured curves are normalised and smoothed radial surface brightness profiles of the Hα emission line flux from our 48 LINER galaxies and compared to a PSF convolved point-source illumination 1/r²-profile in black. All profiles are normalised with respect to the central flux inside a 15 radius aperture. Different colours represent different morphological types ranging from round elliptical galaxies (dark red) to disk-dominated spiral galaxies (dark blue), with lighter colours in-between. Beyond the inner few arcsec for LINER galaxies of all types, there is a significant excess, with up to two orders of magnitude, above the prediction from a point-source ionisation. The vertical grey lines illustrate the radial extent covered by a 3″-diameter SDSS aperture when the CALIFA galaxies with would be placed at the indicated higher redshifts.