1995/12/12 by Marek Gierliński, Marek Gierlinski, Gierlinski, Marek +12
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Nuclear Physics and Applications #Radioactive Decay and Measurement Techniques #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9512073
2 pages, 3 figures, to appear in Proc. Conf. "Roentgenstrahlung from the Universe", Wuerzburg, Germany, September 25-29, 1995
arxiv created 1995/12/12 · openalex publication_date 1995/12/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present the results of 4 simultaneous observations of Cygnus X-1 by Ginga and OSSE. The X-ray/gamma-ray spectra can be described by an intrinsic continuum and a component due to Compton reflection including an iron K-alpha line. The intrinsic spectrum at X-ray energies is a power-law with a photon spectral index of Gamma=1.6. The intrinsic gamma-ray spectrum can be phenomenologically described by either a power-law without cutoff up to 150 keV, and an exponential cutoff above that energy, or by an exponentially cutoff power law and a second hard component.