XMM-Newton Proposal 03065603

Details XMM-Newton Proposal 03065603 XMM-Newton Proposal 03065603

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..213w&link_type=abstract

XMM-Newton Proposal ID #03065603

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Oy Car, Ht Cas, Z Cha, Xmm-Newton Proposal 03065603

Scientific paper

We have applied the proven optical technique of eclipse mapping to X-ray observations of disc-accreting white dwarfs, allowing us to map the extent and distribution of X-ray emitting plasma around the compact object. Observations of four different systems have allowed us to build a consistent picture of the accretion geometry that depends only on accretion rate. At low rates the X-ray region is smaller than the white dwarf, but at high rates it is much larger. Here we propose an observation of ONE of our well-studied low accretion rate systems, to be triggered when it enters a high accretion rate state. This will allow us to test our basic picture in a system that differs only in accretion rate and investigate the origin of the second source of X-rays.

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