XMM-Newton observations of two transient millisecond X-ray pulsars in quiescence
Preprint
- 24 March 2005
Abstract
We report on XMM-Newton observations of two X-ray transient millisecond pulsars (XRTMSPs). We detected XTE J0929-314 with an unabsorbed luminosity of \~7x10^{31} erg/s. (0.5-10 keV) at a fiducial distance of 10 kpc. The quiescent spectrum is consistent with a simple power law spectrum. The upper limit on the flux from a cooling neutron star atmosphere is about 20% of the total flux. XTE J1807-294 instead was not detected. We can put an upper limit on the source quiescent 0.5-10 keV unabsorbed luminosity <4x10^{31} erg/s at 8 kpc. These observations strenghten the idea that XRTMSPs have quiescent luminosities significantly lower than classical neutron star transients.Keywords
All Related Versions
- Version 1, 2005-03-24, ArXiv
- Published version: Astronomy & Astrophysics, 434 (3), L9.
This publication has 0 references indexed in Scilit: