Abstract
IN this letter we report that in February 1976, the X-ray and radio emission from Cyg X-1 underwent a simultaneous transition, similar to that observed in March 1971 when the source was first detected at radio frequencies.
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References
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BRAES, L., MILEY, G. Another correlated X-ray–radio transition in Cygnus X-1. Nature 264, 731–732 (1976). https://doi.org/10.1038/264731a0
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DOI: https://doi.org/10.1038/264731a0
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