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We investigate the location of an ultra-hard X-ray selected sample of AGNfrom the Swift Burst Alert Telescope (BAT) catalog with respect to the mainsequence (MS) of star-forming galaxies using Herschel-based measurements of thestar formation rate (SFR) and stellar mass (\mstar) from Sloan Digital SkySurvey (SDSS) photometry where the AGN contribution has been carefully removed.We construct the MS with galaxies from the Herschel Reference Survey andHerschel Stripe 82 Survey using the exact same methods to measure the SFR and\mstar{} as the Swift/BAT AGN. We find a large fraction of the Swift/BAT AGNlie below the MS indicating decreased specific SFR (sSFR) compared to non-AGNgalaxies. The Swift/BAT AGN are then compared to a high-mass galaxy sample(COLD GASS), where we find a similarity between the AGN in COLD GASS and theSwift/BAT AGN. Both samples of AGN lie firmly between star-forming galaxies onthe MS and quiescent galaxies far below the MS. However, we find norelationship between the X-ray luminosity and distance from the MS. While themorphological distribution of the BAT AGN is more similar to star-forminggalaxies, the sSFR of each morphology is more similar to the COLD GASS AGN. Themerger fraction in the BAT AGN is much higher than the COLD GASS AGN andstar-forming galaxies and is related to distance from the MS. These resultssupport a model in which bright AGN tend to be in high mass star-forminggalaxies in the process of quenching which eventually starves the supermassiveblack hole itself.

Decreased Specific Star Formation Rates in AGN Host Galaxies