The X-Ray to Mid-Infrared Relation of AGN at High Luminosity
  The X-ray and mid-IR emission from active galactic nuclei (AGN) are strongly
correlated. However, while various published parameterizations of this
correlation are consistent with the low-redshift, local Seyfert galaxy
population, extrapolations of these relations to high luminosity differ by an
order of magnitude at nuL(nu)(6um) = 1e47 erg/s. Using data from the Wide-field
Infrared Survey Explorer, we determine the mid-IR luminosities of the most
luminous quasars from the Sloan Digital Sky Survey and present a revised
formulation of the X-ray to mid-IR relation of AGN which is appropriate from
the Seyfert regime to the powerful quasar regime.
