XMM-Newton Proposal 03016512

Details XMM-Newton Proposal 03016512 XMM-Newton Proposal 03016512

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop...55g&link_type=abstract

XMM-Newton Proposal ID #03016512

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ngc1167, Ngc1358, Ngc2655, Ngc3254, Ngc3735, Ngc3976, Ngc4169, Ngc4378, Ngc6951, Ngc7743, Ngc2639, Ngc7479, Xmm-Newton Proposal 03016512

Scientific paper

Recent X-ray surveys have shown a dramatic deficit of obscured AGN at high redshift. This comes in contrast with the situation in the nearby Universe which shows a huge fraction of heavily absorbed objects. However, this discrepancy may arise because the column density information locally is ill-determined. Here, we propose to obtain snapshot (10 ksec) observations of an optically selected sample (12) of nearby Seyfert galaxies from the Ho et al.catalogue. Together with the galaxies which have been already observed, our survey will cover ALL the Sy galaxies in the above sample. The superb quality XMM-Newton spectra will accurately probe the column densities and will provide the least biased measurement of the AGN column density distribution locally.

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