SIMBAD references

1978ApJ...226..976W - Astrophys. J., 226, 976-983 (1978)

He II lam 4686 emission in the spectrum of HDE 226868 (Cygnus X-1).

WALKER G.A.H., YANG S. and GLASPEY J.W.

Journal keyword(s):

Simbad objects: 4

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