Looking for Variability in Cygnus X1

We present observations of HDE 226868, the companion to Cygnus X-1. Low resolution (R=4.3 Å per pixel) spectra of the visible region, 6500 Å to 3000 Å, made with Maryland Space Grant Consortium’s 0.5-meter telescope at John Hopkins University over the summer. This region includes emissions from hydrogen and helium which are shown to be time variable by Gies et al. (2003). We examined these spectra for variability.
References:
D. R. Gies et al. “Wind Accretion and State Transitions in Cygnus X-1” in The Astrophysical Journal, 583 (2003)