Abstract
Andrew and Purton1 discovered a weak high frequency radio source, which they identified with the strong X-ray source Sco X-1. The identification was confirmed by Ables2, who also discovered significant changes in the source's flux density. A subsequent high resolution study of the region by Hjellming and Wade3 at 2,695 and 8,085 MHz showed clearly the presence of three closely spaced sources; the central source was found to be highly variable over a period of hours and was identified with the optical object associated with the X-ray source. It was noted that its flare emission tended to be considerably stronger at 2,695 MHz than at 8,085 MHz, with spectral indices of upto 1.5.
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Andrew, B. H., and Purton, C. R., Nature, 218, 855 (1968).
Ables, J. G., Astrophys. J., 155, L27 (1969).
Hjellming, R. M., and Wade, C. M., Astrophys. J., 164, L1 (1971).
Apparao, Krishna, M. V., Nature, 229, 114 (1971).
Jauncey, D. L., Nature, 230, 200 (1971).
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SLEE, O., HIGGINS, C. Physical Sciences: 80 MHz Observations of the Scorpius X-1 Source. Nature 234, 210 (1971). https://doi.org/10.1038/234210a0
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DOI: https://doi.org/10.1038/234210a0
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