Joint BeppoSAX/RossiXTE Observation of Cygnus X-2

Details Joint BeppoSAX/RossiXTE Observation of Cygnus X-2 Joint BeppoSAX/RossiXTE Observation of Cygnus X-2

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cnoc.conf...38p&link_type=abstract

The Second National Conference on Astrophysics of Compact Objects, held in Bologna (Italy), September 19 - 21, 2001, p. 38

Astronomy and Astrophysics

Astrophysics

Scientific paper

We report on a joint BeppoSAX/RossiXTe observation of the Z-type low mass X-ray binary Cygnus X-2. The source was in the so-called high overall intensity state and in less than 24 hours went through all three branches of the Z-track. The continuum X-ray spectrum could be described by the absorbed sum of a soft thermal component and a Comptonized component. The timing power spectrum showed several components including QPO in the ranges 28-50 Hz while the source was on the horizontal branch (HBO). We found that the HBO frequency was well correlated with the parameters of soft thermal component in the X-ray spectrum.

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