A Broad-Band Gamma-Ray Spectrum of Cygnus X-1 A Broad-Band Gamma-Ray A Broad-Band Gamma-Ray Spectrum of Cygnus X-1 Spectrum of Cygnus X-1 M. McConnell 1 , J. Ryan 1 , W. Collmar2, V. Schönfelder 2 , H. Steinle 2 , A. Strong 2 , H. Bloemen 3 , W. Hermsen 3 , L. Kuiper 3 , K. Bennett 4 , B. Phlips 5 and J. Ling 6 1 University of New Hampshire, Durham, NH 2 Max Planck Institute (MPE), Garching, Germany 3 SRON - Utrecht, Utrecht, Netherlands 4 Astrophysics Divsion, ESTEC, Noordwijk, Netherlands 5 Universities Space Research Associaton, Washington, DC 6 NASA Headquarters, Washington, DC & Jet Propulsion Laboratory, Pasadena, CA