X-ray vs. H2O maser emission in AGN

Details X-ray vs. H2O maser emission in AGN X-ray vs. H2O maser emission in AGN

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..164c&link_type=abstract

XMM-Newton Proposal ID #06548005

Statistics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ugc3789, Ngc6264, Iras16288+3923, Viizw73, Ngc613

Scientific paper

H2O megamaser radio emission provides a unique way to map accretion disks and estimate masses of the nuclear engines in AGN. An accurate analysis of X-ray spectra instead allows us to estimate column densities providing a direct measure of the nuclear activity. So far, H2O maser sources associated to AGN tend to show a high column density or are even Compton-thick. Unfortunately, the statistics of these studies are still poor, because of the lack of X-ray data for a large percentage of known maser galaxies. Here we propose to take advantage of the higher sensitivity of XMM to follow-up a small sample of sources detected by Swft-XRT, for which the low number of counts in the spectra above 2 keV prevented us to derive an accurate value of the column density.

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