Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1

Cygnus X-1 (HDE 226868)

Cygnus X-1 - A search for eclipse and precession effects

Cygnus X-1 - A two-temperature accretion disk model which explains the observed hard X-ray spectrum

Cygnus X-1 - an interpretation of the spectrum and its variability

Cygnus X-1 - Further observations of variable circular polarization

Cygnus X-1 - Optical and X-ray evidence for a 78/39 day period

Cygnus X-1 - The Remnant of the Historical Supernova of 1408

Cygnus X-1 15-GHz radio flux increasing

Cygnus X-1 and GRS 1915+105

Cygnus X-1 entered the soft state