The X-Ray Spectrum of Cygnus X-1

摘要: The first moderate-resolution (FWHM∼160 eV) X-ray spectrum of a galactic black hole candidate in the 1-11 keV band has been obtained with BBXRT experiment aboard Astro 1. There is broad excess flux 6-7 above simple power-law continuum which consistent that expected from reflection observed disk neutral material surrounding central source. edge at 7.1 due to photoelectric absorption by Fe deeper than predicted for solar abundances, suggests an overabundance little evidence any emission features possible exception narrow line 6.4 equivalent width 13±11 eV