XMM-Newton observations of the very-faint persistent X-ray binary AX J1754.2-275

Details XMM-Newton observations of the very-faint persistent X-ray binary AX J1754.2-275 XMM-Newton observations of the very-faint persistent X-ray binary AX J1754.2-275

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..155d&link_type=abstract

XMM-Newton Proposal ID #05550001

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ax J1754.2-2754, Xmm-Newton Proposal Id #05550001

Scientific paper

We propose a single 35 ksec observation of the very-faint persistent X-ray binary AX J1754.2-2754, an enigmatic neutron star system that is underluminous by orders of magnitude compared to the well-known bright X-ray binaries. Previous observations of AX J1754.2-2754 with ASCA and Swift suggest that the source spectrum is unusually soft (powerlaw index of ~3) for an LMXB, but the spectral errors on these observations are large. With our proposed XMM-Newton observation we will obtain a high-quality data of AX J1754.2-2754 for the first time, which allows for a detailed study of its spectrum (e.g., verify its softness) and look for possible orbital modulations and X-ray pulsations; all these phenomena can refine our understanding of the nature of this system.

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