Monitoring Supergiant Fast X‐Ray Transients withSwift. I. Behavior Outside Outbursts
نویسندگان
چکیده
منابع مشابه
Monitoring Supergiant Fast X-ray Transients with Swift. Iii. Outbursts of the Prototypical Sfxts Igr J17544−2619 and Xte
IGR J17544−2619 and XTE J1739−302 are considered the prototypical sources of the new class of High Mass X–ray Binaries, the Supergiant Fast X–ray Transients (SFXTs). These sources were observed during bright outbursts on 2008 March 31 and 2008 April 8, respectively, thanks to an on-going monitoring campaign we are performing with Swift, started in October 2007. Simultaneous observations with XR...
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The advent of Swift has allowed, for the first time, the possibility to give Supergiant Fast X–ray Transients (SFXTs), the new class of High Mass X–ray Binaries discovered by INTEGRAL, non serendipitous attention throughout most phases of their life. In this paper we present our results based on the first year of intense Swift monitoring of four SFXTs, IGR J16479−4514, XTE J1739−302, IGR J17544...
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IGR J16479−4514 is a Supergiant Fast X–ray Transient (SFXT), a new class of High Mass X–ray Binaries, whose number is rapidly growing thanks to the INTEGRAL observations of the Galactic plane. It was regularly monitored with Swift/XRT since November 2007, to study the quiescent emission, the outburst properties and their recurrence. A new bright outburst, reaching fluxes above 10 −9 erg cm −2 s...
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Context. In the magneto-centrifugal mechanism for jet formation, accreting neutron stars are assumed to produce relativistic jets only if their surface magnetic field is weak enough (B ∼ 108 G). However, the most common manifestation of neutron stars are pulsars, whose magnetic field distribution peaks at B ∼ 10 G. If the neutron star magnetic field has at least this strength at birth, it must ...
متن کاملThe X-ray outbursts of Be/X-ray transients
We present a new scenario for the behaviour of Be/X-ray binaries based on long-term multiwavelength monitoring and the decretion disc model. The circumstellar discs of the primaries are truncated because of the tidal and resonant effect of the neutron star. The geometry of the systems and the value of viscosity determine the presence or absence of Type I X-ray outbursts. The interaction of a st...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/590077