Open Access
Table 1
Features used in the Random Forest classification.
| Group 1: magnitude distribution features | |
|---|---|
| Feature name | Description |
| Sigma | The standard deviation of all the magnitudes about the mean Ks band magnitude(2) |
| Skewness | The skewness of the magnitude distribution(2) |
| Kurtosis | The kurtosis of the magnitude distribution(2) |
| MV | The ratio between the Sigma and the median magnitude in the Ks band(3) |
| AD | The Anderson-Darling test(1) assessing how similar the distribution is to a Gaussian |
| ACstd | The standard deviation of the convolution of the light curve with itself(3) |
| Slope | The slope of a linear fit to the (non-phased) light curve(2) |
| MAD | The Mean Absolute Deviation about the Median defined above(2) |
| RCS | The ratio between the MAD and the Sigma defined above(3) |
| Amplitude (A) | The difference between the magnitudes at the 95 and 5 percentile. A sort of robust amplitude(2) |
| mpr20 | The ratio between the magnitude at 60 and 40 percentile, and the amplitude defined above(2) |
| mpr35 | The ratio between the magnitude at 67 and 32 percentile, and the amplitude defined above2 |
| mpr50 | The ratio between the magnitude at 75 and 25 percentile, and the amplitude defined above(2) |
| mpr65 | The ratio between the magnitude at 82 and 17 percentile, and the amplitude defined above(2) |
| mpr80 | The ratio between the magnitude at 90 and 10 percentile, and the amplitude defined above(2) |
| Beyond1Std | Percentage of points beyond one st. dev. from the weighted mean |
| The ratio between the magnitudes below over above 1 sigma from the mean (weighted by the photometric error)(2) | |
| Tm | Ratio between the difference minimum-mean, over the total amplitude(4) |
| Group 2: shape of the light curve features | |
| Period | Period |
| A1A2ratio | The ratio of the amplitudes when the light curve is phased with the double of the period (discards binaries with different minima) |
| Rising Time | Phase difference between the first minimum to the next maximum of the light curve |
| Falling Time | Phase difference between the absolute maximum and the next minimum of the light curve |
| Rising/Falling time | Ratio between the two quantities defined above |
| Phased Skewness | The skewness of the phased light curve |
| Group 3: Fourier fit features | |
| a1, .., a7 | The amplitude of the Harmonics of the Fourier fit |
| ϕ1, ..., ϕ7 | The phase shift of the Harmonics of the Fourier fit |
| a21, a31, a41 | The amplitude ratios of the Harmonics, (e.g., a21 is a2 over a1, etc.) |
| ϕ21, ϕ31, ϕ41 | The phase shift ratios of the Harmonics (e.g., ϕ21 is ϕ2 over ϕ1) |
| Group 4: post classification features | |
| Probability | The Random Forest output probability |
| Template MSE | Mean square error of the RRab template fit (Braga et al. 2019) |
| S/N | The signal to noise of the phased light curve as defined in Eq. (2) |
| Nbins | Number of empty bins if the folded lightcurve is binned (in 20 bins) along the phase. |
Notes. (1)Anderson & Darling (1952), (2)Richards et al. (2011), (3)Kinemuchi et al. (2006), (4)Kim et al. (2011).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.