108 citations · 446 across the 11 of their papers we have counts for
6 papers · 1 filter
Orbital and superorbital variability and their coupling in X-ray binaries
Andrzej A. Zdziarski, Juri Poutanen, Askar Ibragimov +2
We review X-ray flux modulation from X-ray binaries on time scales corresponding to the orbital period and those at longer time scales (so called superorbital). Those modulations p…
Superorbital variability of X-ray and radio emission of Cyg X-1 - II. Dependence of the orbital modulation and spectral hardness on the superorbital phase
Juri Poutanen, Andrzej A. Zdziarski, Askar Ibragimov
We discover a pronounced dependence of the strength of the X-ray orbital modulation and the hardness in Cyg X-1 in the hard state on its superorbital phase. Our results can be well…
Superorbital variability of X-ray and radio emission of Cyg X-1. I. Emission anisotropy of precessing sources
A. Ibragimov, A. A. Zdziarski, J. Poutanen
We study theoretical interpretations of the 150-d (superorbital) modulation observed in X-ray and radio emission of Cyg X-1 in the framework of models connecting this phenomenon to…
Supersoft X-ray Sources. Basic Parameters
V. Suleimanov, A. Ibragimov
The parameters of ten supersoft X-ray sources (RX J0439.8-6809, RX J0513.9-6951, RX J0527.8-6954, CAL 87, CAL 83, 1E 0035.4-7230, RX J0048.4-7332, 1E 0056.8-7154, RX J0019.8 +2156,…
Supersoft X-ray Sources. Parameters of Stellar Atmospheres
A. Ibragimov, V. Suleimanov, A. Vikhlinin +1
ROSAT spectra of 11 supersoft X-ray sources (RX J0439.8-6809, RX J0513.9-6951, RX J0527.8-6954, CAL 87, CAL 83, 1E 0035.4-7230, RX J0048.4-7332, 1E 0056.8-7154, RX J0019.8 +2156, R…
Broad-band spectra of Cyg X-1 and correlations between spectral characteristics
Askar Ibragimov, Juri Poutanen, Marat Gilfanov +2
We present the results of spectral analysis of 42 simultaneous broad-band Ginga--OSSE and RXTE--OSSE observations of Cyg X-1 carried out in 1991 and 1996--1999. The hardest spectra…