Map showing the location with excess of emission at the wavelengths corresponding to the red bump (5760 − 5860 Å, rest-frame). For reference, the map in Hα flux made by line fitting on a spaxel-by-spaxel basis is overplotted with ten evenly spaced contours (in logarithmic scale) ranging from 1.26 × 10⁻¹⁸ erg cm⁻² s⁻¹ spaxel⁻¹ to 1.26 × 10⁻¹⁵ erg cm⁻² s⁻¹ spaxel⁻¹. Likewise, the different regions and areas discussed along the work are marked with the same colour and line code as in Fig. 3. North is up and east towards the left.