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Multicolor Photometry of SV Cam in 1997

Kjurkchieva D., Marchev D., Ogłoza W.

Acta Astronomica

2000

Vol. 50, No. 4

517--528

High speed BVR(I)C photometry of the short period RS CVn binary SV Cam is presented. Its light curve is asymmetric with a depression of brightness by 0.04-0.05 mag after the primary eclipse. Good fit of the synthetic light curve to the observational data in all colors can be obtained assuming presence of two cool spots with equal angular sizes of 20° and temperatures 4350 K located at middle latitude above and below the stellar equator on opposite hemispheres of the primary star.

Orbital Solutions for Three RS CVn Systems: WY Cnc, SV Cam and XY UMa

Pojmański G.

Acta Astronomica

1998

Vol. 48, No. 4

711--727

Near IR spectroscopic observations of WY Cnc, SV Cam and XY UMa binary systems of RS CVn type are presented. Systemic velocity and radial velocity semi-amplitudes of primary components in each system are derived using cross-correlation between cleaned spectra and G2 noiseless templates. Secondary semi amplitudes are determined from the primary subtracted spectra using the cross-correlation function maps and direct cross-correlation. Masses of the stars are derived and system properties briefly discussed. Primary components in all three systems seem to be more massive than was earlier deduced from their spectral classification. Regarding stellar masses, SV Cam should be classified as F5V+K0V pair. Observations of XY UMa fully confirm results obtained previously using a method for detecting faint secondaries in the low signal-to-noise spectra.