Title: The Mass of the Black Hole in Cygnus X-1 Authors: Jerome A. Orosz, Jeffrey E. McClintock, Jason P. Aufdenberg, Ronald A. Remillard, Mark J. Reid, Ramesh Narayan, Lijun Gou Cygnus X-1 is a binary star system that is comprised of a black hole and a massive giant companion star in a tight orbit. Bui...