Fig. 4.

KI and KIM selection schemes (Messias et al. 2012). Left panel: KI classification scheme suitable for IR AGN at z ≤ 2.5. Due to the redshift distribution of these VLBI sources only one is excluded from this plot. Right panel: composite 3-colour KIM selection scheme plotted in the IM colour space. Sources are classed as AGN if they satisfy the K criterion ([K]−[4.5] > 0; black circles surrounding the markers) and are located in the IM ‘wedge’.
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