Global and spatially resolved diagnostic diagrams. Top: Diagnostic diagrams by Baldwin et al. (1981) (left), Veilleux & Osterbrock (1987) (middle), and Lamareille (2010) (right) for the galaxies’ integrated flux measurements. The gray error bars in the top right indicate all diagrams’ mean flux ratio errors along the x- and y-axis. In the case of the Lamareille (2010) diagram, only galaxies with [OII]λ3727 measurements via FADO were included. Bottom: The same diagnostic diagram of all spaxels satisfying the S/N > 3 criteria in all four emission lines – [OIII]5006 Å, Hβ, Hα, and [NII]6585 Å. The diagnostic diagram by Baldwin et al. (1981) distinguishes between star-forming (black), composite (red), AGN (blue), and LINER (green) emission while the diagrams by Lamareille (2010) and Veilleux & Osterbrock (1987) both only differentiate between star-forming and possibly composite (red), AGN (blue), and LINER (green).