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Publication
Featured researches published by Bernard W. Bopp.
The Astrophysical Journal | 1972
Bernard W. Bopp; Gerald Grupsmith; P. Vanden Bout
Preliminary results from an extensive series of spectroscopic observations of the HZ Her optical counterpart of the eclipsing, pulsating X-ray binary Her X-1. Spectrograms with a dispersion of 30 A/mm reveal a spectral type as late as F5 near minimum in the light curve with the G-band and metallic lines present. Narrow Fe lines show that HZ Her is not a rapid rotator. Low-dispersion (115 A/mm) spectra, obtained with 10-minute time resolution, reveal rapid (10-min) variations in the 4640 N III emission and in the 4471 He I absorbtion features. The H-beta absorption is variable in equivalent width, and shows evidence of being partially filled with emission.
Publications of the Astronomical Society of the Pacific | 1972
Bernard W. Bopp; P. A. Vanden Bout
The C in-N Hi 465O line has been detected in Cyg X-2. An absorption feature is present to the blue of He ii x4686. Both lines and continuum appear to vary independently in intensity. Key words: X-ray source - emission lines
Monthly Notices of the Royal Astronomical Society | 1973
Bernard W. Bopp; David S. Evans
Monthly Notices of the Royal Astronomical Society | 1970
Bernard W. Bopp; David S. Evans; J. D. Laing; Terence J. Deeming
Monthly Notices of the Royal Astronomical Society | 1974
Bernard W. Bopp
Monthly Notices of the Royal Astronomical Society | 1974
Bernard W. Bopp
Nature | 1972
P. Vanden Bout; Gerald Grupsmith; Bernard W. Bopp
The Observatory | 1974
David S. Evans; Bernard W. Bopp
Archive | 1974
Bernard W. Bopp; Gerald Grupsmith; Robert S. McMillan; Paul A. Vanden Bout; H. Alwyn Wootten
Archive | 1974
Bernard W. Bopp; Gerald Grupsmith; Paul A. Vanden Bout
