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Cepheid Variables in the AAVSO International Database


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Leonid Berdnikov

Sternberg Astronomical Institute, 13, Universitetskij Prosp., Moscow 119899, Russia


Janet A. Mattei

Sara J. Beck

AAVSO Headquarters, 25 Birch Street, Cambridge, MA 02138


Presented at the 91st Annual Meeting of the AAVSO, October 26, 2002


Abstract  There are 205,500 visual observations for 148 Cepheids as well as 182 photoelectric observations for 7 Cepheids in the AAVSO International Database. These data were reduced with Hertzsprung’s method and 2,010 times of maximum brightness were obtained. O-C diagrams for 21 well-observed Cepheids are presented and results obtained are compared with existing data.

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