νL_ν(60   μm) as a function of redshift for X-ray AGNs in the individual COSMOS, GOODS-S and GOODS-N fields. The points in all panels are colored by logarithmic bins in hard band X-ray luminosity (L_X), as shown. The upper panels show the mean L₆₀ estimated by combining fluxes from PACS detections and stacks. Note the consistency across all fields between the values and variation with redshift of the mean measurements. The lower panels show individual PACS detected AGNs and the stacked points for PACS undetected AGNs (in bins of redshift and L_X). The solid black lines show the approximate 3σνL_ν(60   μm) limit, derived from the flux limits of the 100 and 160 μm PEP photometry catalogs.