AGN dust tori: the X-ray-infrared connection

Understand

We have combined the CLASXS Chandra survey in Lockman with the Spitzer SWIRE survey data to study the X-ray-infrared connection for AGN.

• The sample consists of 401 X-ray-sources, of which 306 are detected by Spitzer, and a further 257 AGN candidates detected through their dust torus, but not by Chandra.
• For X-ray sources the X-ray hardness ratio has been modelled in terms of a power-law with absorption N(H).
• The optical and infrared data have been modelled in terms of our well-established optical galaxy and QSO templates, and infrared templates based on radiative transfer models.