The Spectrum of Cyg X-1 From OSO-8; November 7 to November 24, 1975 Serlemitsos, P. ; Boldt, E. ; Holt, S. ; Rothschild, R. ; Becker, R. ; Swank, J. ; Pravdo, S. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: June 1976 Bibcode: 1976BAAS....8..439S