... gaps

The time base represents 10 nights of ground-based photometry of the star IC 4996 # 89 (Zwintz et al. 2004; Zwintz & Weiss 2006). See 5.6 for further detail.

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... to

Some applications prefer a different normalization of Eqs. (5), (6). E.g., in publications dealing with the theoretical aspects of functional analysis, both Fourier Coefficients and the inverse transform from the frequency into the time domain are frequently normalized by $K^{-\frac{1}{2}}$ instead of K^-1. Also in the field of communications engineering, different normalizations are used. In fact, one is free to distribute the normalization factors among these relations arbitrarily, as long as the product of both factors is K^-1.

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... domain

Since the Fourier Analysis of equidistant time series is restricted to discrete frequencies associated to orthogonal DFTs, nothing will change for non-zero frequencies in this special case.

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... significance

to be distinguished from significance in the sense of a confidence threshold as used in hypothesis testing.

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... Periodogram

Lomb's (1976) original publication deals with periodogram analysis in terms of power. The expression of the present results in terms of squared amplitude produces explicit consistency.

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... Diagram

The nomenclature is motivated by the shape of the diagrams, if the time-domain sampling is close to equidistant (see, e.g., Fig. 4).

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... MOST

MOST is a Canadian Space Agency mission, jointly operated by Dynacon Inc., the University of Toronto Institute of Aerospace Studies, the University of British Columbia, and with the assistance of the University of Vienna, Austria.

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... fit

DFT suffers from systematic deviations of peak frequencies (Kovacs 1980).

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... dispersion

The PDM tested here is based on 300 equidistant phase bins of constant width  $\frac{\pi}{10}$ rad.

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