Central 10″ × 10″ of the MUSE maps. North is up and east is to the left. Left panel: Hα-map. The dominant source is the blue spot, the second peak is approximately located near the centre of the dust lane. Middle panel: ratio [NII]/Hα. At the brightest Hα peaks, the ratio resembles an HII-region. In the outer parts, [NII] gets stronger like in LINER-like spectra, indicating the contribution of other ionising sources like the post-AGB stars of the old stellar population. Right panel: map of Balmer decrements mapping the extinction of the emission line region.