Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models

The primary goal of this proposal is to find more objects unabsorbed in theXrays and without broad optical lines, which represent a serious challenge tosimple AGN Unification Models. A campaign of simultaneous Xray and opticalobservations of unabsorbed Seyfert 2s has already proved successful in previousXMMNewton AOs, leading to the discovery of the first true Seyfert 2 withoutbroad line region (Bianchi et al., 2008). We therefore intend to pursue ourstrategy, proposing to complete our XMMNewton observations of a sample of.bonafide. Seyfert 2 galaxies with no Xray absorption. The key to find genuineunabsorbed Seyfert 2s., excluding variability issues, is to performsimultaneous Xray and optical spectroscopy. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]