An XMM-Newton observation of the neutron star X-ray transient 2S 1803-245 in quiescence

Abstract

We observed the neutron star X-ray transient 2S 1803-245 in quiescence with the X-ray satellite XMM-Newton, but did not detect it. An analysis of the X-ray bursts observed during the 1998 outburst of 2S 1803-245 gives an upper-limit to the distance of <7.3 kpc, leading to an upper-limit on the quiescent 0.5-10 keV X-ray luminosity of <2.8x10^32 erg/s (3sigma). Since the expected orbital period of 2S 1803-245 is several hrs, this limit is not much higher than those observed for the quiescent black hole transients with similar orbital periods.

arXiv comment5 pages, 3 figures, accepted for publication in MNRAS

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• Cooling of Accretion-Heated Neutron Stars
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• Statistical theory of thermal evolution of neutron stars
• Neutron Star Radius Measurement with the Quiescent Low-Mass X-ray Binary U24 in NGC 6397
• Thermal evolution and quiescent emission of transiently accreting neutron stars
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• X-ray Spectral Identification of Three Candidate Quiescent Low-Mass X-ray Binaries in the Globular Cluster NGC 6304
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• Catalog of outbursts of neutron star LMXBs
• On the recurrence times of neutron star X-ray binary transients and the nature of the Galactic Centre quiescent X-ray binaries