Abstract
THE X-ray source Cyg X-1 is known to be highly variable and recently has been found to pulsate with a period of 73 ms (ref. 1). Here we report the detection of its radio counterpart at a frequency of 1,415 MHz.
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Oda, M., Gorenstein, P., Gursky, H., Kellogg, E., Schreier, E., Tananbaum, H., and Giacconi, R., Astrophys. J. Lett., 166, L1 (1971).
Hjellming, R. M., and Wade, C. M., Astrophys. J. Lett., 164, L1 (1971).
Braes, L. L. E., and Miley, G. K., Astron. Astrophys. (in the press).
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BRAES, L., MILEY, G. Physical Sciences: Detection of Radio Emission from Cygnus X-1. Nature 232, 246 (1971). https://doi.org/10.1038/232246a0
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DOI: https://doi.org/10.1038/232246a0
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