XMM-Newton Proposal 02017702

Details XMM-Newton Proposal 02017702 XMM-Newton Proposal 02017702

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...95g&link_type=abstract

XMM-Newton Proposal ID #02017702

Computer Science

Sound

Ic3639, Ugc2456, Xmm-Newton Proposal 02017702

Scientific paper

"Reflection-dominated" Seyfert 2 galaxies are usually interpreted in terms of an active nucleus covered by a Compton-thick absorber. However, recently discovered transitions between reflection- and transmission-dominated (Compton-thin) states are more convincingly explained as changes in the activity level of the Active Galactic Nucleus (AGN). In order to quantitatively address this issue, we propose to complete the observations of an optically defined, complete and unbiased sample of "Compton-thick" Seyfert 2 galaxies, to measure on a sound statistical basis the rate of reflection- to transmission-dominated state transitions. This requires the observation of still 3 objects - "priority C" targets for the AO2 - for a total allocation time of 60 ks.

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