منابع مشابه
X–ray Transients in Quiescence
Transient X–ray binaries remain in their quiescent state for a long time (months to hundred years) and then bright up as the most powerful sources of the X–ray sky. While it is clear that, when in outbursts, transient binaries are powered by accretion, the origin of the low luminosity X–ray emission that has been detected in the quiescent state has different interpretations and provides the uni...
متن کاملOptical and X–ray Observations of Igr J00291+5934 in Quiescence
We report on optical and X–ray observations of the accretion powered ms pulsar IGR J00291+5934 in quiescence. Time resolved I–band photometry has been obtained with the 4.2 m William Herschel Telescope, while a 3 ks Chandra observation provided contemporaneous X–ray coverage. We found an unabsorbed 0.5–10 keV X–ray flux of 1×10 erg cm s which implies that the source was in quiescence at the tim...
متن کاملX-ray and UV observations of the dwarf nova VW Hyi in quiescence
We present an analysis of X-ray and ultra-violet data of the dwarf nova VW Hyi that were obtained with XMM-Newton during the quiescent state. The X-ray spectrum indicates the presence of an optically thin plasma in the boundary layer that cools as it settles onto the white dwarf. The plasma has a continuous temperature distribution that is well described by a power-law or a cooling flow model w...
متن کاملX–ray/optical observations of XTE J0421+560/CI Cam in quiescence
We report on a BeppoSAX observation of the transient X–ray source XTE J0421+560 during quiescence performed ∼150 days after the 1998 April outburst. The source had an unabsorbed 0.5–10 keV flux of 6.7 × 10−12 erg cm−2 s−1 and was still remarkably soft with most of the emission below 2 keV. The X–ray spectrum can be fit with the same twotemperature model as the outburst observations. There is ev...
متن کاملOptical and ROSAT X-ray observations of the dwarf nova OY Carinae in superoutburst and quiescence
We present ROSAT X-ray and optical light curves of the 1994 February superoutburst of the eclipsing SU UMa dwarf nova OY Carinae. There is no eclipse of the flux in the ROSAT HRI light curve. Contemporaneous ‘wide B’ band optical light curves show extensive superhump activity and dips at superhump maximum. Eclipse mapping of these optical light curves reveals a disc with a considerable physical...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1988
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/231.3.783