Showing 1 - 20 results of 30 for search '"Cygnus X-1"', query time: 0.81s Refine Results
  1. 1

    THE TRIGONOMETRIC PARALLAX OF CYGNUS X-1 by Reid, Mark J., McClintock, Jeffrey E., Narayan, Ramesh, Gou, Lijun, Orosz, Jerome A., Remillard, Ronald A

    Published 2015
    “…We report a direct and accurate measurement of the distance to the X-ray binary Cygnus X-1, which contains the first black hole to be discovered. …”
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    Article
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    THE MASS OF THE BLACK HOLE IN CYGNUS X-1 by Orosz, Jerome A., McClintock, Jeffrey E., Aufdenberg, Jason P., Reid, Mark J., Narayan, Ramesh, Gou, Lijun, Remillard, Ronald A

    Published 2015
    “…Cygnus X-1 is a binary star system that is comprised of a black hole and a massive giant companion star in a tight orbit. …”
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    THE EXTREME SPIN OF THE BLACK HOLE IN CYGNUS X-1 by Gou, Lijun, McClintock, Jeffrey E., Reid, Mark J., Orosz, Jerome A., Steiner, James F., Narayan, Ramesh, Xiang, Jingen, Arnaud, Keith A., Davis, Shane W., Remillard, Ronald A

    Published 2015
    “…The compact primary in the X-ray binary Cygnus X-1 was the first black hole to be established via dynamical observations. …”
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    Search for ultralight bosons in Cygnus X-1 with Advanced LIGO by Sun, Ling, Brito, Richard, Isi Banales, Maximiliano S

    Published 2020
    “…Here we present results of a directed search for such signals from the Cygnus X-1 binary, using data from Advanced LIGO’s second observing run. …”
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    An X-ray reverberation mass measurement of Cygnus X-1 by Mastroserio, G, Ingram, A, Van Der Klis, M

    Published 2019
    “…We jointly fit the time-averaged spectrum and the real and imaginary parts of the cross-spectrum as a function of energy for a range of Fourier frequencies to Rossi X-ray Timing Exporer data from the X-ray binary Cygnus X-1. We also show that introducing a self-consistently calculated radial ionisation profile in the disc improves the fit, but requires us to impose an upper limit on ionization profile peak to allow a plausible value of the accretion disc density. …”
    Journal article
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    The high-energy spectrum of Cygnus X–1: corona and jet contributions by Del Santo M., Malzac J., Belmont R., Bouchet L., De Cesare G.

    Published 2013-12-01
    “…We have analyzed six years of INTEGRAL observations of the BH binary Cygnus X-1. We report on the evolution of the physical parameters of the accretion flow across spectral transitions. …”
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    CONFIRMATION VIA THE CONTINUUM-FITTING METHOD THAT THE SPIN OF THE BLACK HOLE IN CYGNUS X-1 IS EXTREME by Gou, Lijun, McClintock, Jeffrey E., Steiner, James F., Reid, Mark J., Orosz, Jerome A., Narayan, Ramesh, Hanke, Manfred, Garcia, Javier A., Remillard, Ronald A

    Published 2015
    “…In Gou et al., we reported that the black hole primary in the X-ray binary Cygnus X-1 is a near-extreme Kerr black hole with a spin parameter a * > 0.95 (3σ). …”
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    Article
  11. 11

    USING THE X-RAY DUST SCATTERING HALO OF CYGNUS X-1 TO DETERMINE DISTANCE AND DUST DISTRIBUTIONS by Xiang, Jingen, Lee, Julia C., Nowak, Michael A., Wilms, Jörn

    Published 2015
    “…We present a detailed study of the X-ray dust scattering halo of the black hole candidate Cygnus X-1 based on two Chandra High Energy Transmission Gratings Spectrometer observations. …”
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    Article
  12. 12

    NuSTAR AND SUZAKU OBSERVATIONS OF THE HARD STATE IN CYGNUS X-1: LOCATING THE INNER ACCRETION DISK by Parker, M. L., Tomsick, J. A., Miller, J. M., Yamaoka, K., Lohfink, Anne M., Fabian, A. C., Alston, W. N., Boggs, S. E., Christensen, F. E., Craig, W. W., Gandhi, P., Grefenstette, B. W., Hailey, C. J., Harrison, F. A., Kara, Erin, King, A. L., Stern, D., Walton, D. J., Wilms, J., Zhang, W. W., Nowak, Michael A., Grinberg, Victoria, Furst, F.

    Published 2015
    “…We present simultaneous Nuclear Spectroscopic Telescope Array (NuSTAR ) and Suzaku observations of the X-ray binary Cygnus X-1 in the hard state. This is the first time this state has been observed in Cyg X-1 with NuSTAR, which enables us to study the reflection and broadband spectra in unprecedented detail. …”
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  13. 13

    High-resolution X-Ray Spectroscopy of Interstellar Iron toward Cygnus X-1 and GX 339-4 by Lía Corrales, Eric V. Gotthelf, Efrain Gatuzz, Timothy R. Kallman, Julia C. Lee, Michael Martins, Frits Paerels, Ioanna Psaradaki, Stefan Schippers, Daniel Wolf Savin

    Published 2024-01-01
    “…We present a high-resolution spectral study of Fe L -shell extinction by the diffuse interstellar medium (ISM) in the direction of the X-ray binaries Cygnus X-1 and GX 339–4, using the XMM-Newton reflection grating spectrometer. …”
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    CHANDRA X-RAY SPECTROSCOPY OF THE FOCUSED WIND IN THE CYGNUS X-1 SYSTEM. I. THE NONDIP SPECTRUM IN THE LOW/HARD STATE by Hanke, Manfred, Wilms, Jörn, Nowak, Michael A., Pottschmidt, Katja, Schulz, Norbert S., Lee, Julia C.

    Published 2015
    “…We present analyses of a 50 ks observation of the supergiant X-ray binary system Cygnus X-1 (Cyg X-1)/HDE226868 taken with the Chandra High Energy Transmission Grating Spectrometer (HETGS). …”
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    SPECTRAL STATE DEPENDENCE OF THE 0.4–2 MEV POLARIZED EMISSION IN CYGNUS X-1 SEEN WITH INTEGRAL/IBIS, AND LINKS WITH THE AMI RADIO DATA by Laurent, Philippe, Bel, Marion Cadolle, Pottschmidt, Katja, Pooley, Guy, Bodaghee, Arash, Rodriguez, Jerome, Grinberg, Victoria, Wilms, Jorn, Gouiffes, Christian

    Published 2015
    “…Polarization of the [> over ~] 400 keV hard tail of the microquasar Cygnus X-1 has been independently reported by INTEGRAL/Imager on Board the INTEGRAL Satellite (IBIS), and INTEGRAL/SPectrometer on INTEGRAL and interpreted as emission from a compact jet. …”
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    Tracing Black Hole Signatures in Several Black Hole Candidates Based on Their X-Ray Spectral Evolution by Alfarizki Fahmi Iman, Vierdayanti Kiki

    Published 2020-01-01
    “…The spectral evolutions of the candidates bear a resemblance to both Cygnus X-1 and XTE J1752-223. We note that during Swift/XRT observations, the spectra of Cygnus X-1 and IGR J17451-3022 are mostly dominated by the non- thermal component. …”
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