X-ray and UV spectroscopy of Cygnus X-1 = HDE226868

Details X-ray and UV spectroscopy of Cygnus X-1 = HDE226868 X-ray and UV spectroscopy of Cygnus X-1 = HDE226868

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8023228p&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Cygnus Constellation, Ultraviolet Spectroscopy, X Ray Spectroscopy, Astronomical Models, Photoelectricity

Scientific paper

Observations are presented of Cygnus X-1 with the solid-state spectrometer on the Einstein Observatory. The X-ray spectra of two intensity dips viewed near superior conjunction did not exhibit increased photoelectric absorption. Rather the data support a model in which an increase in the electron scattering optical depth modifies both the observed spectrum and the intensity. The characteristic temperature of the intervening material is greater than 5 x 10 to the 7th power K. These measurements were in part simultaneous with observations by IUE. The ultra violet spectrum and intensity remained relatively constant during an X-ray intensity dip.

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