Fit of the source PG 1211+143. For this source, the first satisfactory fit (blue line) is given by KERRBB+host galaxy. The spectrum rise at Log ν/Hz <  14.5 is caused by the IR emission of the dusty torus. Assuming an intrinsic reddening of the source (corrected by assuming E[B − V] = 0.1 mag), the new fit (red line) describes the AGN continuum for Log ν >  14.8, with no need for the host-galaxy emission. Right panel: thick and dashed lines correspond to the first and second fits, respectively (blue and red lines on the left panel, respectively).