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1987ApJ...321..438N - Astrophys. J., 321, 438-446 (1987/October-0)
The HeII lambda 4686 and H-alpha emission lines of Cygnus X-1.
NINKOV Z., WALKER G.A.H. and YANG S.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): Stars: Individual Henry Draper Number: HDE 226868 - Stars: Individual Constellation Name: Cygnus X-1 - X-Rays: Binaries
Simbad objects: 7
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