Cosmic X-ray surveys of Active Galactic Nuclei: synergy between X-ray   and infrared observations
  We briefly review the synergy between X-ray and infrared observations for Active Galactic Nuclei (AGNs) detected in cosmic X-ray surveys, primarily with XMM-Newton, Chandra, and NuSTAR. We focus on two complementary aspects of this X-ray-infrared synergy (1) the identification of the most heavily obscured AGNs and (2) the connection between star formation and AGN activity. We also briefly discuss future prospects for X-ray-infrared studies over the next decade. 
D. M. Alexander (Durham)
astro-ph.HE astro-ph.CO astro-ph.GA