Table A.1.
All 84 features used in the feature selection.
No. | Feature | Description |
Selected features for the clustering analysis | ||
1 | log_sigvar* | Significance of variability in the G band in a log scale |
2 | frac_period* | Period over the standard deviation (std) of the three band Gaia lightcurve periods |
3 | std* | Standard deviation of the G, BP, and RP periods |
4 | fapG* | False alarm probability of the Lomb-Scargle dominant frequency peak (G band) |
5 | fapRP* | False alarm probability of the Lomb-Scargle dominant frequency peak (RP band) |
6 | fapBP* | False alarm probability of the Lomb-Scargle dominant frequency peak (BP band) |
7 | Period_G* | Derived period from the G-band lightcurve |
8 | Period_BP* | Derived period in the BP-band lightcurve |
9 | period_RP* | Derived period in the RP-band lightcurve |
10 | amp_G* | Amplitude of variability in the G band (mag.) |
11 | amp_BP* | Amplitude of variability in the BP band (mag.) |
12 | kurtosisG* | G-band kurtosis of the periodogram |
13 | p99* | 99th percentile of all periodogram peaks based on the G-band lightcurves |
14 | p95_100* | 95th percentile of the first 100 frequency peaks based on the G-band lightcurves |
15 | n05* | Number of peaks above 0.5 of the normalised Ψ− periodogram based on the G band |
16 | psi_sigvar* | G-band median absolute deviation of the periodogram |
17 | bp_rp ∤ | BP−RP colour |
18 | range_mag_g_fov | The range of the G-band time series |
19 | abbe_mag_g_fov | The Abbe value of the G-band time series |
20 | iqr_mag_g_fov | The Interquartile Range (IQR) of the G-band time series |
21 | mad_mag_g_fov | The Median Absolute Deviation (MAD) of the G-band time series |
22 | stetson_mag_g_fov | The single-band Stetson variability index |
23 | abbe_mag_bp | The Abbe value of the BP-band time series |
24 | abbe_mag_rp | The Abbe value of the RP-band time series |
25 | outlier_median_g_fov | Greatest absolute deviation from the G median normalised by the error |
26 | skewness_mag_bp | The standardised unbiased unweighted skewness of the BP-band time series |
27 | std_dev_over_rms_err_mag_g_fov | S/N ratio G estimate |
Excluded features in the feature selection processes | ||
28 | G_abs* | Gaia G absolute magnitude |
29 | N_G* | Number of observations in the G band. |
30 | N_BP* | Number of observations in the BP band |
31 | N_RP* | Number of observations in the RP band. |
32 | amp_RP* | Amplitude of variability in the RP band (mag.) |
33 | p90_100* | 90th percentile of the first 100 frequency peaks |
34 | p99_100* | 99th percentile of the first 100 frequency peaks |
35 | rmse_over_ptp_amp* | Root mean square error (RMSE) of the Lomb-Scargle model |
fit over the peak-to-peak G amplitude | ||
36 | parallax ∤ | Gaia parallax |
37 | parallax_error ∤ | Gaia parallax error |
38 | phot_g_mean_mag ∤ | G-band mean magnitude |
39 | phot_g_n_obs ∤ | Number of observation contributing to G photometry |
40 | RUWE ∤ | Renormalised unit weight error |
41 | num_selected_g_fov | Total number of G FOV transits selected for variability analysis |
42 | mean_obs_time_g_fov | Mean observation time for G observations |
43 | time_duration_g_fov | Time duration of the G time series |
44 | min_mag_g_fov | The minimum value of the G-band time series |
45 | max_mag_g_fov | The maximum value of the G-band time series |
46 | mean_mag_g_fov | The mean of the G-band time series |
47 | median_mag_g_fov | The median of the G-band time series |
48 | trimmed_range_mag_g_fov | Trimmed difference between the highest and lowest G-band time series |
49 | std_dev_mag_g_fov | Square root of the unweighted G magnitude variance |
50 | skewness_mag_g_fov | The standardised unbiased unweighted skewness of the G-band time series |
51 | kurtosis_mag_g_fov | The standardised unbiased unweighted kurtosis of the G-band time series |
52 | num_selected_bp | Total number of BP observations selected for variability analysis |
53 | mean_obs_time_bp | Mean observation time for BP observations |
54 | time_duration_bp | Time duration of the BP time series |
55 | min_mag_bp | The minimum value of the BP-band time series |
56 | max_mag_bp | The maximum value of the BP-band time series |
57 | mean_mag_bp | The mean of the BP-band time series |
58 | median_mag_bp | The median of the BP-band time series |
59 | range_mag_bp | The range of the BP-band time series |
60 | trimmed_range_mag_bp | Trimmed difference between the highest and lowest BP-band time series |
61 | std_dev_mag_bp | Square root of the unweighted BP magnitude variance |
62 | kurtosis_mag_bp | The standardised unbiased unweighted kurtosis of the BP-band time series |
63 | mad_mag_bp | The Median Absolute Deviation (MAD) of the BP-band time series |
64 | iqr_mag_bp | The Interquartile Range (IQR) of the BP-band time series |
65 | stetson_mag_bp | The single-band Stetson variability index |
66 | std_dev_over_rms_err_mag_bp | S/N ratio BP estimate |
67 | outlier_median_bp | Greatest absolute deviation from the BP median normalised by the error |
No. | Feature | Description |
68 | num_selected_rp | Total number of RP observations selected for variability analysis |
69 | mean_obs_time_rp | Mean observation time for RP observations |
70 | time_duration_rp | Time duration of the RP time series |
71 | min_mag_rp | The minimum value of the RP-band time series |
72 | max_mag_rp | The maximum value of the RP-band time series |
73 | mean_mag_rp | The mean of the RP-band time series |
74 | median_mag_rp | The median of the RP-band time series |
75 | range_mag_rp | The range of the RP-band time series |
76 | trimmed_range_mag_rp | Trimmed difference between the highest and lowest RP-band time series |
77 | std_dev_mag_rp | Square root of the unweighted RP magnitude variance |
78 | skewness_mag_rp | The standardised unbiased unweighted skewness of the RP-band time series |
79 | kurtosis_mag_rp | The standardised unbiased unweighted kurtosis of the RP-band time series |
80 | mad_mag_rp | The Median Absolute Deviation (MAD) of the RP-band time series |
81 | iqr_mag_rp | The Interquartile Range (IQR) of the RP-band time series |
82 | stetson_mag_rp | The single-band Stetson variability index |
83 | std_dev_over_rms_err_mag_rp | S/N ratio RP estimate |
84 | outlier_median_rp | Greatest absolute deviation from the RP median normalised by the error |
Notes. Features marked with (*) were computed in this work, those with (∤) are from the Gaia DR3 source database (Gaia Collaboration 2023), while the rest were obtained from the Gaia variability summary table (Eyer et al. 2023). A full description of these Gaia statistics can be found in the Gaia documentation here.
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.