Search results for " X-rays: individuals: SAX J1808.4-3658"

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Timing of the 2008 outburst of SAX J1808.4–3658 with XMM-Newton: a stable orbital-period derivative over ten years

2009

We report on a timing analysis performed on a 62-ks long XMM-Newton observation of the accreting millisecond pulsar SAX J1808.4-3658 during the latest X-ray outburst that started on September 21, 2008. By connecting the time of arrivals of the pulses observed during the XMM observation, we derived the best-fit orbital solution and a best-fit value of the spin period for the 2008 outburst. Comparing this new set of orbital parameters and, in particular, the value of the time of ascending-node passage with the orbital parameters derived for the previous four X-ray outbursts of SAX J1808.4-3658 observed by the PCA on board RXTE, we find an updated value of the orbital period derivative, which …

PhysicsOrbital elementsAstrophysics::High Energy Astrophysical PhenomenaX-ray binaryFOS: Physical sciencesSecular evolutionAstronomy and AstrophysicsAstrophysicsDerivativeOrbital periodstars: neutron stars: magnetic fields X-rays: binaries X-rays: individuals: SAX J1808.4-3658Astrophysics - Astrophysics of GalaxiesLuminosityNeutron starSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceMillisecond pulsarAstrophysics of Galaxies (astro-ph.GA)Astrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstronomy & Astrophysics
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