72 citations · 162 across the 7 of their papers we have counts for
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astro-ph2008★ 17 cited
Optical Spectroscopic Observations of Cyg X-1=HDE 226868
Jingzhi Yan, Qingzhong Liu, Petr Hadrava
We present the results of the spectroscopic observations of HDE 226868, the optical counterpart to the black hole X-ray binary Cyg X-1, from 2001 to 2006. We analyze the variabilit…
astro-ph2008★ 72 cited
Stellar Wind Variations During the X-ray High and Low States of Cygnus X-1
D. R. Gies, C. T. Bolton, R. M. Blake +10
We present results from Hubble Space Telescope UV spectroscopy of the massive X-ray binary system, HD226868 = Cyg X-1. The spectra were obtained at both orbital conjunction phases…