The eclipsing accreting millisecond pulsar Swift J1749.4-2807 in quiescence
Abstract
We propose a 100-ks XMM-Newton observation of the transiently accreting neutron star Swift J1749.4-2807 during its quiescent state. The detection of coherent pulsations at a frequency of 518 Hz and X-ray eclipses recurring every 8.82 h during an outburst observed in 2010 have recently established Swift J1749.4-2807 as the first eclipsing millisecond X-ray pulsar discovered to date. This holds great promise for obtaining precise constraints on the neutron star mass. With the proposed XMM-Newton observation we aim to search for a thermal emission component in the X-ray spectrum and to constrain the properties of the X-ray eclipses in quiescence. We request an additional 10-ks Chandra pointing to obtain a sub-arcsecond position for our target that will allow for further multi-wavelength observations.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2010
- Bibcode:
- 2010xmm..prop..197D
- Keywords:
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- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- Swift J1749.4-2