Combining Visual and Photoelectric Observations of Semiregular
Terry T. Moon
Astronomical Society of South Australia (ASSA), GPO Box 199, Adelaide, SA
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
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.