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Combining Visual and Photoelectric Observations of Semiregular Red Variables

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Terry T. Moon

Astronomical Society of South Australia (ASSA), GPO Box 199, Adelaide, SA 5001, Australia

Sebastián A. Otero

Grupo Wezen 1 88, Buenos Aires, Argentina and Centro de Estudios Astron—micos (CEA), Mar del Plata, Argentina

Laszlo L. Kiss

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

Received August 22, 2007; revised November 6, 2007; accepted November 16, 2007

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 θ 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.

Datasets
jmoont361a.txt
jmoont361b.txt