Combining Visual and Photoelectric Observations of Semiregular Red Variables

Volume 36 number 1 (2008)

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Terry T. Moon

Astronomical Society of South Australia (ASSA), GPO Box 199, Adelaide, SA

Sebastian A. Otero

Laszlo L. Kiss

School of Physics, University of Sydney, NSW 2006, Australia

Abstract

Combining visual observations of semiregular variables with measurements of them using a photoelectric photometer is discussed, and then demonstrated using data obtained for the bright, southern semiregular variable ? Aps. Combining such observations is useful in that it can provide a more comprehensive set of data by extending the temporal coverage of the light curve. Typically there are systematic differences between the visual and photometric datasets that must be corrected for.