[OIII]λ5007/Hβ vs. [NII]λ6583/Hα diagnostic diagram for integrated (left panel) and central (right panel) spectra of the currently observed CALIFA sample. Upper limits are indicated with an arrow, if only one of the two ratios could be accurately determined. We also plot data derived from the SDSS spectra of the CALIFA mother sample (orange open squares). The Kauffmann et al. (2003) (blue dashed-line) and Kewley et al. (2001) (red solid-line) demarcation curves are usually invoked to distinguish between SF galaxies and AGN with an intermediate region in between.
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