Fig. 13.
Distribution of sources in the ALLWISE two-colour selection plane (Mateos et al. 2012). 
and 
. Blue circles mark the 218 AGN identified using the ALLWISE criteria. Green crosses indicate all ALLWISE sources located within the XMM-Newton survey area which fulfilled the criterion of Mateos et al. (2012). Red circles are AGN candidates from Sturm et al. (2013a) which were found to have an ALLWISE counterpart. Cyan stars are HMQ/MILLIQUAS sources which were found to have an ALLWISE counterpart.
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