The fading of the extraordinary low mass X-ray binary EXO 0748-676

Details The fading of the extraordinary low mass X-ray binary EXO 0748-676 The fading of the extraordinary low mass X-ray binary EXO 0748-676

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop..152d&link_type=abstract

XMM-Newton Proposal ID #06055603

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Exo 0748-676, Exo 0748-676

Scientific paper

We propose to monitor the dipping low-mass X-ray binary EXO 0748-676 as it turns off and becomes quiescent. RXTE pointed observations of EXO 0748-676 during August 2008 show the source at the lowest flux level since the beginning of the RXTE mission in 1996, indicating that X-ray activity may cease soon, after being a steady accreting X-ray binary since February 1985 (ATel #1736). The proposed XMM observations aim to look at the source both as it turns off and in the period after it ceases X-ray activity to determine the cooling of the neutron star crust, which has been heated by more than 20 years of outburst.

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