0000000000802962

AUTHOR

Patrizia Santolamazza

showing 2 related works from this author

Spectral changes during six years of Scorpius X-1 monitoring with BeppoSAX Wide Field Cameras

2005

We analyse a sample of fifty-five observations of Scorpius X-1 available in the BeppoSAX Wide Field Camera public archive and spanning over the six years of BeppoSAX mission life. Spectral changes are initially analysed by inspection of colour-colour and colour-intensity diagrams, we also discuss the shift of the Z tracks in these diagrams. Then we select two long observations for spectral fitting analysis, a secular shift is evident between the tracks in these observations. We finally extract spectra along the tracks and discuss the best fit model, the parameter variations along the track and between tracks, and their link to the accretion rate.

Accretion (meteorology)Track (disk drive)Astrophysics (astro-ph)X-ray binaryFOS: Physical sciencesAstrophysicsX-ray neutron stars accreting millisecondAstrophysicsWide fieldSpectral lineAccretion rateNeutron starSpectral fittingGeologyAIP Conference Proceedings
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Six Years of ScoX-1 Monitoring with BeppoSAX Wide Field Cameras

2003

We performed a systematic analysis of 54 Wide Field Camera (WFC) observations of ScoX-1 available in the BeppoSAX public archive. Observations span over the six years of BeppoSAX mission lifetime and include 690 hr of data. We searched for shifts and shape changes of the Z pattern in the color-color diagrams. We find that the Z pattern occupies most of the time the same locus in the color-color diagram. There are however a few exceptions, which are discussed in detail.

PhysicsNuclear and High Energy PhysicsAstrophysics (astro-ph)FOS: Physical sciencesAstrophysicsAstrophysicsWide fieldAtomic and Molecular Physics and Optics
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