EXOSAT MEDA observations of Cygnus X-3

MAGIC observations of Cygnus X-3

Dust Scattering Halos with Chandra Observations of Cygnus X - 3 and Cygnus X - 1

We improve the method proposed by Yao et al (2003) to resolve the X-ray dust scattering halos of point sources. Using this method we re-analyze the Cygnus X-1 data observed with Chandra (ObsID 1511) and derive the halo radial profile in different energy bands and the fractional halo intensity (FHI) as I(E) = 0.402×E keV. We also apply the method to the Cygnus X-3 data (Chandra ObsID 425) and de...

First e - VLBI observations of Cygnus X - 3

We report the results of the first two 5 GHz e-VLBI observations of the X-ray binary Cygnus X-3 using the European VLBI Network. Two successful observing sessions were held, on 2006 April 20, when the system was in a quasi-quiescent state several weeks after a major flare, and on 2006 May 18, a few days after another flare. At the first epoch we detected faint emission probably associated with ...

Study the X - ray Dust Scattering Halos with Chandra Observations of Cygnus X - 3 and Cygnus X - 1

We improve the method proposed by Yao et al (2003) to resolve the X-ray dust scattering halos of point sources. Using this method we re-analyze the Cygnus X-1 data observed with Chandra (ObsID 1511) and derive the halo radial profile in different energy bands and the fractional halo intensity (FHI) as I(E) = 0.402×E keV. We also apply the method to the Cygnus X-3 data (Chandra ObsID 425) and de...

Ginga observations of Cygnus X - 2

Wehave analysed all availableX-ray data on the lowmass X-ray binary Cygnus X-2 obtained with the Ginga satellite. A detailed analysis of the spectral and fast timing behaviour of these 4 years of data provides new insights in the behaviour of this Z source. We confirm the previously observed recurrent patterns of behaviour in the X-ray colour-colour and hardnessintensity diagrams consisting of ...