Astronomy and Astrophysics – Astronomy
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.244...93d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 244, May 1, 1990, p. 93-95.
Astronomy and Astrophysics
Astronomy
59
Astronomy, Periodic Variations, Phase Coherence, Statistical Tests, Distribution Functions, Fourier Transformation, Signal To Noise Ratios
Scientific paper
Two widely used methods of testing for periodicity, phase dispersion minimization and epoch-folding are discussed. An analysis of variance approach demonstrates the close relationship between these two methods. It is also shown that the significance test sometimes used in phase dispersion minimization is statistically inaccurate and that the test used in epoch-folding is an approximation valid only for large sample sizes. A simple new test statistic is proposed, applicable to either epoch-folding or PDM, which is statistically sound for all samples sizes, and which is also more sensitive to periodicity than the test statistics previously used with these two methods.
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