Top panels: standard diagnostic [O III]/Hβ vs. [N II]/Hα diagrams. The lines drawn in the figures display the curves used to separate H II-like (below the dashed line) from AGN-ionised regions (above the solid line); the locus in between the two curves is associated with composite SF-AGN regions. The solid line is adapted from Kewley et al. 2001; the dashed curve is taken from Kauffman et al. (2003). In the left panel, flux ratios are obtained considering the total line profiles (i.e. NC+OC fluxes); in the right panel, only the OC fluxes have been used. Small colour-coded dots refer to single spaxel measurements associated with the spatial regions shown in the insets (axis scales are the same as in all previous maps). Black spaxels are associated with flux ratios below the curve from Kauffman et al. (2003); purple to red instead show the increasing distance from the same curve. Central panels: standard diagnostic [O III]/Hβ vs. [S II]/Hα diagrams. The lines separates H II-like ionised regions (below the solid line) from AGN-ionised gas (above the dotted and dashed lines) and LINERs (in the right part of the diagrams). The solid and dashed lines are taken from Kewley et al. (2001) and Kewley et al. (2006), respectively. Colour-coded flux ratio dots highlight the separation between AGN, LINERs, and H II regions, and refer to the spatial regions shown in the insets. Bottom panels: standard diagnostic [O III]/Hβ vs. [O I]/Hα diagrams. The colours of the flux ratio dots and separation lines are the same as those in the central panels. In all figures, the largest blue and red dots refer to the flux ratios obtained from the NW and SE outflow-integrated spectra, respectively; only the flux ratios associated with Hβ and [N II] (or [S II], in the central panels; or [O I] in the bottom panels) lines with an S/N >  3 in are shown in the figures. Representative 1σ errors are shown in the bottom corners of the plots.