= The Mass of the Black Hole in Cygnus X-1 by Jerome A. Orosz and others
{c}
{tag=Work by Jerome A. Orosz}
{title2=2011}
{title2=The Astrophysical Journal 742, 84}
The original study combines optical light curves, companion-star radial velocities, rotational broadening and a distance constraint to infer the compact object's mass. The result $14.8\pm1.0$ solar <masses> is the estimate from this 2011 analysis, rather than a claim about the latest mass determination.
https://arxiv.org/abs/1106.3689
https://doi.org/10.1088/0004-637X/742/2/84
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