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Table 2.
16 variability features.
| Feature | Description | Reference |
|---|---|---|
| Period | Period derived by the Lomb-Scargle algorithm | Lomb (1976) |
| γ1 | Skewness | |
| γ2 | Kurtosis | |
| ψη | η (von Neumann 1941) of a phase-folded light curve | Kim et al. (2014) |
| ψCS | Cumulative sum (Ellaway 1978) index of a phase-folded light curve | Kim et al. (2014) |
| Q3 − 1 | 3rd quartile (75%) – 1st quartile (25%) | Kim et al. (2014) |
| A | Ratio of magnitudes brighter or fainter than the average magnitude | Kim & Bailer-Jones (2016) |
| H1 | Amplitude derived using the Fourier decomposition | Grison (1994) |
| mp90 | 90% percentile of slopes of a phase-folded light curve | Long et al. (2012) |
| mp10 | 10% percentile of slopes of a phase-folded light curve | Long et al. (2012) |
| R21 | 2nd to 1st amplitude ratio derived using the Fourier decomposition | Grison (1994) |
| R31 | 3rd to 1st amplitude ratio derived using the Fourier decomposition | Grison (1994) |
| ϕ21 | Difference between 2nd and 1st phase derived using the Fourier decomposition | Grison (1994) |
| ϕ31 | Difference between 3rd and 1st phase derived using the Fourier decomposition | Grison (1994) |
| K | Stetson K index | Stetson (1996) |
| W | Shapiro–Wilk normality test statistics | Shapiro & Wilk (1965) |
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