AbstractWe evaluate 0.03–20 Hz power spectra of the bright black hole binary Cyg X-1 obtained from non-deconvolved INTEGRAL-ISGRI event data. The ISGRI power spectra are compared to contemporary RXTE-PCA ones in the same hard X-ray energy band of 15–70 keV. They agree well in shape. Since the ISGRI power spectrum of Cyg X-1 is not background corrected it lies about an order of magnitude below the PCA values. In 2003 a soft outburst of Cyg X-1 occurred. From the RXTE-ASM and Ryle radio long term lightcurves and the RXTE spectra we see a canonical “hard state–intermediate state–soft state” evolution. We discuss the evolution of the power spectra in the 15–70 keV range which so far is much less well studied than that at softer energies. We interpret our results regarding the origin of certain variability components.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    INTEGRAL and RXTE power spectra of Cygnus X-1


    Contributors:
    Pottschmidt, K. (author) / Wilms, J. (author) / Nowak, M.A. (author) / Larsson, S. (author) / Zdziarski, A.A. (author) / Pooley, G.G. (author)

    Published in:

    Advances in Space Research ; 38 , 7 ; 1350-1353


    Publication date :

    2005-04-13


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    INTEGRAL and RXTE power spectra of Cygnus X-1

    Pottschmidt, K. | Online Contents | 2006


    Cygnus X-1 from RXTE: Monitoring the Short Term Variability

    Pottschmidt, K. / Wilms, J. / Staubert, R. et al. | British Library Conference Proceedings | 2001


    Cygnus X-1 from RXTE: monitoring the short term variability

    Pottschmidt, K. | Online Contents | 2001


    INTEGRAL/RXTE Observations of Cen A

    Rothschild, R. E. / Tomsick, J. / Wilms, J. et al. | British Library Conference Proceedings | 2005


    Swift, INTEGRAL, RXTE, and Spitzer reveal IGR J16283-4838

    Beckmann, V. / Kennea, J. A. / Markwardt, C. et al. | British Library Conference Proceedings | 2005