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Orbital period changes in RW CrA, DX Vel and V0646 Cen

Chochol, D.; Mašek, M.; Volkov, I. M. +2 more

We aim to determine the absolute parameters of the components of southern Algol-type binaries with deep eclipses RW CrA, DX Vel, V0646 Cen and interpret their orbital period changes. The data analysis is based on a high quality Walraven photoelectric photometry, obtained in the 1960-70s, our recent CCD photometry, ASAS (Pojmanski, 2002), and Hippa…