BPT diagnostic diagram showing the flux ratios of the various emission regions for DELS J0411–0907 (squares) and VDES J0020–3653 (circles); the F_{[N II]λ6584 Å}/F_Hα ratios are all upper limits due to a non-detection of [N II] λ6583. The different colours represent the different emission regions, following the colour scheme in Figs. 5 and 7. The flux ratios were measured from the BLR-subtracted cube. For reference, we show the Kauffmann et al. (2003, black dotted) and Kewley et al. (2001, black dashed) curves which attempt to differentiate between galaxies primarily ionised by star formation (lower left) and AGN (upper right) at low-z. We also show local sources from the SDSS (Abazajian et al. 2009) as the 2D histogram, for comparison.