... binaries

Based on observations collected at the European Southern Observatory, La Silla, Chile, and at the German-Spanish Astronomical Center (DSAZ), Calar Alto, operated by the Max-Planck-Institut für Astronomie Heidelberg jointly with the Spanish National Commission for Astronomy.

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... quadratures

Constant wavelength is used since the heliocentric correction practically did not change during the time interval when the spectra were taken.

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