Comparison of Visual and Photoelectric Photometry for Bright Cepheids (Abstract)

Volume 35 number 1 (2007)

G. Foster

W. M. Lowder

E. J. Oravec

Abstract

(Abstract only) Galactic Cepheid variables have been studied both visually and photoelectrically for decades. While photoelectric data are generally of high precision, they are literally few and far between. Visual data are of lower precision, but for many stars we have great quantities of data over a very long time span, from which we gain useful information about their amplitudes, and can determine periods with startling precision, enabling very detailed study of the stability of Cepheid periods.