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Issue A&A Volume 380, Number 1, December II 2001 Page(s) 388 - 396 Section Instruments, observational techniques and data processing DOI 10.1051/0004-6361:20011430

A&A 380, 388-396 (2001)
DOI: 10.1051/0004-6361:20011430

Monitoring of LPVs with an automatic telescope.

II: A comparison of APT data and visual observations

T. Lebzelter¹ and L. L. Kiss<sup>2

1</sup>  Institut für Astronomie, Universität Wien, Türkenschanzstr. 17, 1180 Vienna, Austria
²  Department of Experimental Physics and Astronomical Observatory, University of Szeged, Hungary

(Received 3 September 2001 / Accepted 11 October 2001 )

Abstract
We discuss the possibilities of investigating the semiregular and irregular light change found in evolved late type giant stars with photometric and visually obtained (amateur) data. Period analysis has been done on light curve data from both sources for a sample of semiregular variables. The results are compared to test the ability of visual data to show the frequency contents present in these variables. We find that both sources of data complete each other, as fitting the fine structure visible only in the photometric data needs long-term visual monitoring to guarantee the uniqueness of the fit.

Key words: stars: variables: general -- stars: late-type -- stars: AGB and post-AGB -- methods: observational -- techniques: photometric

Offprint request: T. Lebzelter, lebzelter@astro.univie.ac.at

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© ESO 2001

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