Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..181b&link_type=abstract
XMM-Newton Proposal ID #03056005
Physics
Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ngc 7603, Mrk 6, Xmm-Newton Proposal 03056005
Scientific paper
In AO-3 we started a quasi-simultaneous X-ray/optical spectroscopy observation programme of changing type Seyfert galaxies, with the aim of investigating the origin of the apparent X-ray/optical type mismatches seen in some AGN. We use these type-changing AGN to test whether this mismatch is caused by non-simultaneity between the X-ray and optical observations or it is due to intrinsic properties of the Broad Line Region, as suggested by our previous work. In this proposal we request XMM-Newton observations of a sample of 5 targets (in addition to that already performed in AO-3). Quasi-simultaneous and delayed optical spectroscopy of these targets will also be obtained from the ground.
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