Low-level and Quiescent Emission of Supergiant Fast X-ray Transients

Details Low-level and Quiescent Emission of Supergiant Fast X-ray Transients Low-level and Quiescent Emission of Supergiant Fast X-ray Transients

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..117s&link_type=abstract

XMM-Newton Proposal ID #05031502

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Xte J1739-302, Igr J17544-2619, Xmm-Newton Proposal 05031502

Scientific paper

Supergiant Fast X-ray Transients (SFXTs) are a newly-discovered class of x-ray binary with short outbursts (timescale of hours) and late O to early B supergiant companions. They are not persistently bright, but the nature of their quiescence or low-level variability is unknown due to a lack of high-sensitivity observations. We propose long pointings to the two best-studied SFXTs and a third object, XTE J1743-363, which seems to be transitional between SFXTs and persistent supergiant HMXBs. We will thus characterize the nature of low-level emission in SFXTs and enable future searches for new SFXT systems in quiescence using archival Newton/2MASS/Spitzer data.

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