Abstract
From optical and X-ray data available for the binary X-ray sources, the masses of the components were determined univocally in three systems. A discussion about the masses in other three systems is also presented. Besides Cyg X-1, SMC X-1 is another black-hole candidate.
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de Freitas Pacheco, J.A. The masses of binary X-ray sources. Astrophys Space Sci 32, 205–210 (1975). https://doi.org/10.1007/BF00646226
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DOI: https://doi.org/10.1007/BF00646226