Fig. 1.
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Spectra of our sample of 68 AGN normalized to the flux at 14 μm. Type-1 and type-2 AGN are shown in black and gray, respectively. Vertical dot-dashed lines indicate the locus of the wavelengths chosen to compute the spectral slopes (see text). The bottom-right inset shows the distribution of X-ray luminosities versus redshift in our sample.
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