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Fig. 4


Comparison between the hard X-ray and the de-reddened [OIII] luminosities. Only 5 sources (magenta squares) are securely classified as CT AGN (LHX/L[OIII] ,corr< 0.1, black line), while 30% of the sample still fall in a region where CT AGN can be found (0.1 <LHX/L[OIII] ,corr< 1, black dashed line and 1 <LHX/L[OIII] ,corr< 10, grey dashed line). NLS1 are represented by red triangles.

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