X-ray and ultraviolet spectroscopy of Cygnus X-1 = HDE 226868
X-ray and ultraviolet spectroscopy of Cygnus X-1 = HDE 226868
复制标题
Cygnus X-1 = HDE 226868 的 X 射线和紫外光谱
DOI：
10.1086/183237
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
G. McCluskey
中科院分区：
文献类型：
--
作者：
S. Pravdo;N. White;R. Becker;Y. Kondo;E. Boldt;S. Holt;P. Serlemitsos;G. McCluskey
Observations of Cygnus X-1 with the solid-state spectrometer on the Einstein Observatory are presented. 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 about 50 million K. These measurements were in part simultaneous with observations by IUE. The ultraviolet spectrum and intensity remained relatively constant during an X-ray intensity dip.
