Reduced χ² map of the explored parameter space. The colour scale indicates the relative goodness of the fit, with darker shades corresponding to lower χ² values. Bottom: reduced χ² map over the entire ∼15″ × 15″ field. Masked bins are coloured grey. We highlight the position of the spatial bins 50 and 175, whose LOSVD histograms are shown in Fig. 3. Top: zoom-in into the nuclear region. We highlight the position of the spatial bins 0,1,4 and 10, whose LOSVD histograms are shown in Fig. 3.