Panel a: two-color image of [O III] (green) and Hα (red), from the fit of the star-subtracted 1px-σ smoothed data cube. Panel b: two-color image of Hα emission (red) and stellar continuum between ∼5100–5800 Å (blue). Panel c: map of the total dust extinction in V band A_V from the measured Balmer decrement (Hα/Hβ flux ratio), from the fit of the star-subtracted Voronoi-binned data cube (produced to have an average signal-to-noise ratio per wavelength channel around Hβ of at least 4 in each bin). Panel d: electron density from [S II] λ6716/λ6731 diagnostic line ratio (a typical value of T_e = 10⁴ K is assumed for the temperature of the gas).