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Temporal and spectral variation of Cyg X-1

Nature volume 270, pages 154–156 (1977)Cite this article

Abstract

AMONG galactic X-ray sources, Cyg X-1 is distinctive because of its marked variability. Its X-ray intensity curve exhibits apparently aperiodic variation of large amplitudes1–3. It is tempting to suppose that this peculiarity of Cyg X-1 is related to the physical properties of the accretion disk formed around the black hole presumed to accompany the supergiant HDE226868 optically identified with Cyg X-1. We report here certain features of the subsecond variability concluded from a recent rocket observation.

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Author notes

  1. S. MIYAMOTO

    Present address: Department of Physics, Osaka University, Toyonaka, Osaka, Japan

Authors and Affiliations

  1. Institute of Space and Aeronautical Science, University of Tokyo, Komaba, Meguro, Tokyo

    Y. OGAWARA, K. DOI, M. MATSUOKA, S. MIYAMOTO & M. ODA

Authors
  1. Y. OGAWARA
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  2. K. DOI
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  3. M. MATSUOKA
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  4. S. MIYAMOTO
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  5. M. ODA
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OGAWARA, Y., DOI, K., MATSUOKA, M. et al. Temporal and spectral variation of Cyg X-1. Nature 270, 154–156 (1977). https://doi.org/10.1038/270154a0

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