We present analysis of spectral energy distributions ( SEDs ) from mid-infrared through X-ray of a sample of 420 hard X-ray selected , z-band and Spitzer/IRAC detected active galactic nuclei ( AGN ) and AGN candidates from the GOODS multiwavelength survey .
We fit local empirical SED templates of both normal and active galaxies to the rest-frame luminosities calculated from spectroscopic ( where available ) and photometric redshifts .
The majority of the optically stellar-dominated ( with early-type galaxy fits ) sources are moderately luminous ( L _ { X, 2 - 10 keV } 10 ^ { 43 } erg/s ) hard X-ray sources with high X-ray hardness ratios ( HR > 0.2 ) , high MIR luminosities and red MIR colors in excess of a typical stellar dominated elliptical galaxy .
These sources likely harbor heavily obscured ( though Compton-thin ) AGN .
The observed ratio of obscured to unobscured AGN has an integrated mean of \sim 3.4 ~ { } :~ { } 1 but declines with increasing redshift .
This effect has been explained by Treister et al .
( 2004 ) as an observational bias triggered by the lack of spectroscopic redshifts at R > 24 which are predominantly higher redshift obscured sources .