Other
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..223g&link_type=abstract
XMM-Newton Proposal ID #03070022
Other
Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ugc 9944, Iras 03106-0254, Iras 04502-0317, Iras 04507+0358, Mcg -01-24-012, Iras 11215-2806, Ugc 2514, Mcg -05-27-013, Eso 383-G18, Iras 14082+1347, Iras 14317-3237, Mrk 618, Eso 362-G8, Mrk 78, Mrk 268, Eso 137-G34, Ic 5169, Ngc 7450, Ngc 7672, Xmm-Newton Proposal 03070022
Scientific paper
We are conducting a study of the absorbers in Seyfert galaxies, combining X-ray measurements of the column densities to geometrical constraints derived from radio and optical imaging to test the Unified model and possible modifications to it. We wish to characterize the absorption in 22 Seyferts that have never before been observed in hard X-rays. These observations would complete the X-ray coverage of Seyferts with resolved radio jets, which we use as an indicator of the orientation of the central engine. By comparing the absorbers to the alignment of the Seyfert structures we have found evidence suggesting that unification models with only a pc-scale absorber are incomplete: there is another absorber aligned with the plane of the host galaxies on 100 pc scales that hides the BLR in some Seyfert 2s.
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