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Studies on amplitude modulated RR Lyrae stars
II. RS Bootis
Received 30 June 1998 / Accepted 28 July 1998
All photographic and photoelectric observations of RS Boo since 1938 have been analysed in order to obtain an accurate mathematical description of the light variation. A Fourier sum with frequencies , where and a linear period change of the and the components with give a fit with a standard deviation of mag. Considering the various quality and the long span of the data, this level of accuracy can be regarded as a good one. In contrast with some reports about the existence of a secondary modulation we have not found any sign of this component in the prewhitened spectrum.
Key words: stars: individual: RS Boo stars: variables: RR Lyrae stars: oscillations
© European Southern Observatory (ESO) 1998
Online publication: October 21, 1998