Spectroscopic diagnostic diagrams for the galaxies of the sample. The small dot points correspond to the SDSS/NVSS sample studied by Baldi & Capetti (2010), while the symbols in color represent galaxies with the new JVLA observations. The solid lines are from Kewley et al. (2006) and separate star-forming galaxies (SFG), LINER, and Seyfert. First panel: region between the two curves is populated by the composite galaxies. The dashed lines instead separate RL AGN into HEG from LEG (Buttiglione et al. 2010), which roughly correspond to the Seyfert and LINER classification for RL AGN. The red squares are the LEGs, while the blue circles are the HEGs. The large filled symbols are associated with BH masses >10⁸ M_⊙, large empty with ~10^7.7 M_⊙, and small symbols with <10^7.3 M_⊙.