DOI: https://doi.org/10.18524/1810-4215.1994.7.105709

(MULTI-) FREQUENCY VARIATIONS OF STARS. SOME METHODS AND RESULTS

I. L. Andronov

Анотація


Some algorithms and programs are described for determining the parameters of processes with constant and variable periods. Those are: FOUR-1 periodogram analysis by using the least squares one-harmonic fit, FOUR-N corresponds to a number of harmonics, FOUR-T to a sine wave with a linear trend, FOUR-M to a number of waves with independent frequencies. Multishif-ted and mean weighted periodograms are discussed. PERMIN allows the determination of a best fit period from the moments of "characteristic events" only. The programs allows one to determine not only the parameters, but accuracy estimates and the " false alarm" probability as well. Some applications of these and some other methods to variable stars of different types are discussed.

Ключові слова


Data reduction; Stars; binary; multiple; pulsating

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Посилання


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