This webpage is being kept for archival purposes only.
It may be updated in the future, but it is not currently being maintained.
It may be updated in the future, but it is not currently being maintained.
Deep Survey for Obscured AGN
BeppoSAX has measured soft - hard spectra of bright Seyfert 2 galaxies:
BeppoSAX Spectra (MECS and PDS) of NGC6240 and NGC 1068
(Vignati et al 1999, astro-ph/9908253)
EXIST would conduct the first all-sky survey for obscured AGN such as these bright Seyfert 2 systems measured by BeppoSAX, which directly show the very large absorbing column absorbing (and partially fluorescing) the soft x-ray spectra below ~10 keV. More than 3000 such systems could be identified and studied with EXIST, and their contribution to both the diffuse hard x-ray and (indirectly) the IR luminosity density of the universe could be measured.
