Abstract
The short-period binary radial velocity program at the David Dunlap Observatory is described in some detail, with a brief summary on its history. The program is now reaching its 100-th orbit, with about 40 more orbits remaining within our access to Northern (δ > −15), bright (<10 mag), short-period (<1 day) binary systems. All data are processed uniformly using the Broadening Function (BF) formalism which offers best information extraction and permits analysis of heavily rotationally blended spectra. Many close binaries appear to have visual or spectroscopic companions.
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