31.3 deg^2^ Stripe 82X spectral analysis

Of the 6181 unique X-ray sources in this field, we analyze a sample of 2937 candidate active galactic nuclei (AGNs) with solid redshifts and sufficient counts determined by simulations. Our results show an observed population with median values of spectral index , column density log and intrinsic, de-absorbed, 2-10keV luminosity log, in the redshift range 0-4.

We derive the intrinsic, model-independent, fraction of AGNs that are obscured (22<=log(NH/cm^-2^)<24), finding a significant increase in the obscured AGN fraction with redshift and a decline with increasing luminosity. The average obscured AGN fraction is 57+/-4% for log(LX/erg/s)>43. This work constrains the AGN obscuration and spectral shape of the still uncertain high-luminosity and high-redshift regimes (log(LX/erg/s)>45.5, z>3), where the obscured AGN fraction rises to 64+/-12%.