Search results for " Stars: Pulsars: Individual: Alphanumeric: XTE J1807-294"

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Spin up and phase fluctuations in the timing of the accreting millisecond pulsar XTE J1807-294

2007

We performed a timing analysis of the 2003 outburst of the accreting X-ray millisecond pulsar XTE J1807-294 observed by RXTE. Using recently refined orbital parameters we report for the first time a precise estimate of the spin frequency and of the spin frequency derivative. The phase delays of the pulse profile show a strong erratic behavior superposed to what appears as a global spin-up trend. The erratic behavior of the pulse phases is strongly related to rapid variations of the light curve, making it very difficult to fit these phase delays with a simple law. As in previous cases, we have therefore analyzed separately the phase delays of the first harmonic and of the second harmonic of …

Orbital elementsPhysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Phase (waves)Static timing analysisFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsLight curveAstrophysicsPulsars: General Stars: Pulsars: Individual: Alphanumeric: XTE J1807-294 Stars: Magnetic Fields Stars: Neutron X-Rays: Binaries [Stars]Pulse (physics)Settore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceMillisecond pulsarHarmonicStars: Pulsars: General Stars: Pulsars: Individual: Alphanumeric: XTE J1807-294 Stars: Magnetic Fields Stars: Neutron X-Rays: BinariesSpin-½
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