Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models

Details Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..187b&link_type=abstract

XMM-Newton Proposal ID #04050205

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ngc 3147, Ic 1631, Xmm-Newton Proposal 04050205

Scientific paper

We propose to observe with XMM-Newton a sample of `bona-fide' Seyfert 2 galaxies with no X-ray absorption. The selected sources are a conservative subsample taken from the Panessa & Bassani (2002) sample, including only Seyfert 2s where no column density in excess of the Galactic one has ever been observed in the X-rays, within sensitive limits. The primary goal of this proposal is to find objects unabsorbed in the X-rays and without broad optical lines, which would represent a serious challenge to simple AGN Unification Models. The key to find genuine `unabsorbed Seyfert 2s', excluding variability issues, is to perform simultaneous X-ray and optical spectroscopy. We therefore intend to coordinate ground-based optical observations with the XMM-Newton observations.

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