Confirmation via the Continuum-fitting Method that the Spin of the Black Hole in Cygnus X-1 Is ExtremeDOI: info:10.1088/0004-637X/790/1/29v. 79029
Gou, Lijun, McClintock, Jeffrey E., Remillard, Ronald A., Steiner, James F., Reid, Mark J., Orosz, Jerome A., Narayan, Ramesh, Hanke, Manfred, and García, Javier. 2014. "Confirmation via the Continuum-fitting Method that the Spin of the Black Hole in Cygnus X-1 Is Extreme." The Astrophysical Journal, 790 29. https://doi.org/10.1088/0004-637X/790/1/29.