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AbstractAbstract
[en] We present results from simultaneous observations of Cyg X-1 with INTEGRAL and RXTE in 2002 November and December, employing the new RXTE calibration from HEASOFT 5.3. The broad-band X-ray/γ-ray spectrum is well described by Comptonization spectra with an additional reflection component. The temperature of the Comptonizing plasma is kTe ∼ 60-80 keV and its optical depth is τ ∼ 0.8-1.2. The covering factor of the reflector is Ω/2π ∼ 0.1. There is a possible soft excess below 10 keV, interpreted as emission from the accretion disk. The spectral parameters are slightly different from those obtained by us earlier due to the different RXTE-PCA calibration
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X-ray timing 2003: Rossie and beyond; Cambridge, MA (United States); 3-5 Nov 2003; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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