Cepheid Variables in the AAVSO International Database

Volume 31 number 2 (2003)

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Leonid Berdnikov

Sternberg

Janet AkyÅz Mattei

Sara J. Beck

AAVSO

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 Hertzprung'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.