The discovery of quiescent X-ray emission from SAX J1808.4-3658, the transient 2.5ms pulsar

Abstract

We report on a 20 ks BeppoSAX observation of the transient 2.5 ms X-ray pulsar SAX J1808.4-3658 in its quiescent state. A source at a level of ~ 3 x 10^-3 c/s was detected with the BeppoSAX/MECS at a position consistent with that of SAX J1808.4-3658. The inferred 0.5-10 keV luminosity was to that measured from other quiescent low mass X-ray transients hosting an old neutron star. This result is discussed in the light of the propeller and radio pulsar shock emission models for the quiescent emission of these systems.

5 pages plus 1 ps figure. Accepted for publication on ApJ Letters

References in corpus (4)

• Coronal X-Ray Emission from the Stellar Companions to Transiently Accreting Black Holes
• Transient radio emisison from SAX J1808.4-3658
• The optical counterpart of SAX J1808.4-3658, the transient bursting millisecond X-ray pulsar
• The discovery of quiescent X-ray emission from SAX J1808.4-3658, the transient 2.5ms pulsar

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