17 citations · 23 across the 2 of their papers we have counts for
2 papers
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★ 6 cited
Optical Spectroscopic Observations of CI Camelopardalis
Jingzhi Yan, Qingzhong Liu, Hengrong Hang
We present the results of optical spectroscopic observations of CI Cam. Double-peaked profiles were simultaneously observed for the first time in the hydrogen Balmer, He {\small I}…