ar X iv : a st ro - p h / 99 03 21 8 v 2 1 6 M ar 1 99 9 Temporal and Spectral Correlations of Cyg

ar X iv : a st ro - p h / 99 03 21 8 v 1 1 5 M ar 1 99 9 Temporal and Spectral Correlations of Cyg X

Temporal and spectral properties of X-ray rapid variability of Cyg X-1 are studied by an approach of correlation analysis in the time domain on different time scales. The correlation coefficients between the total intensity in 2–60 keV and the hardness ratio of 13–60 keV to 2–6 keV band on the time scale of ∼ 1 ms are always negative in all states. For soft states, the correlation coefficients ...

ar X iv : a st ro - p h / 98 03 21 2 v 1 1 8 M ar 1 99 8 Anisotropy of CMB & Cosmological Model

In this brief review I will touch upon the main points and trends of observational and theoretical cosmology, that influence and change today our understanding of the Universe.

ar X iv : a st ro - p h / 96 08 03 6 v 1 8 A ug 1 99 6 TABLE 1 Properties of LMC Double - Mode

ar X iv : a st ro - p h / 99 05 37 8 v 1 2 8 M ay 1 99 9 New evolutionary scenarios for short orbital period CVs

We suggest new evolutionary scenarios for non-magnetic short orbital period CVs. The first model is the analogy of the 'hibernation scenario' or the 'modern hibernation scenario'. The second one is an extension of Mukai & Naylor (1995) ideas. All models imply a tight connection between permanent superhump systems and classical novae. We highlight the significance of the observed evolution of V1...

ar X iv : a st ro - p h / 99 10 50 9 v 1 2 8 O ct 1 99 9 Monitoring the Short - Term Variability of Cyg X - 1 : Spectra and Timing

We present first results from the spectral and temporal analysis of an RXTE monitoring campaign of the black hole candidate Cygnus X-1 in 1999. The timing properties of this hard state black hole show considerable variability, even though the state does not change. This has previously been noted for the power spectral density, but is probably even more pronounced for the time lags. From an anal...