Narrow-band photoelectric photometry of V1357 Cygni /Cygnus X-1/ and AM Herculis /4U 1813 + 50/

Details Narrow-band photoelectric photometry of V1357 Cygni /Cygnus X-1/ and AM Herculis /4U 1813 + 50/ Narrow-band photoelectric photometry of V1357 Cygni /Cygnus X-1/ and AM Herculis /4U 1813 + 50/

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sval....5..177k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, July 1979, p. 332-337.) Soviet Astronomy Letters, vol. 5, July-Aug. 1979, p. 177-180

Astronomy and Astrophysics

Astronomy

1

Binary Stars, Electrophotometry, Stellar Spectrophotometry, X Ray Stars, Continuous Spectra, H Alpha Line, Light Curve, Spectral Bands, White Dwarf Stars

Scientific paper

Narrow-band observations of V1357 Cyg in the continuum near lambda 4795, and of AM Her in the continuum near lambda 6370 and in H-alpha emission, were made during 1977-1978. Microvariability of the V1357 Cyg system was observed on 1978 Aug 16/17 (JD 43737) and might represent an eclipse of the 09.7 Iab star by the accretion disk. The H-alpha emission intensity in AM Her correlates with phase of the 3h.1 period; minimum H-alpha intensity coincides with minimum intensity of the continuum at lambda 6370. The continuum light curve of AM Her was found to vary strongly from cycle to cycle.

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