Probing AGN Variability on 10-100 kyr Timescales

Details Probing AGN Variability on 10-100 kyr Timescales Probing AGN Variability on 10-100 kyr Timescales

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..105s&link_type=abstract

XMM-Newton Proposal ID #06726604

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Iras F14281+135, Sdss 221, Ugc 7342, Ugc 11185

Scientific paper

Following the discovery of IC 2497 and Hanny's Voorwerp, the citizen scientists taking part in the Galaxy Zoo project have identified a sample of low-redshift galaxies with extended AGN-photoionized clouds indicative of a Seyfert- luminosity AGN. We select a sample of 7 such galaxies where the lack of infrared emission makes it plausible that the AGN phase illuminating the cloud has shut down within the light travel time to the cloud. We propose to use XMM-Newton to observe these objects, as in IC 2497, to test whether these AGN have indeed shut down and thus providing a measurement of significant AGN variability on previously inaccessible timescales.

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