Table 2.
Stationarity, variability, and normality properties of investigated light curves.
| Stationarity | Variability | Normality | |||||
|---|---|---|---|---|---|---|---|
| Filter | ADF pval | W. mean pval(χ2) | W. mean χred2 | W. median pval(χ2) | W. median χred2 | KS pval | AD pval |
| AGN | |||||||
| Hα (all frames) | 0 | 0 | 5.23 ± 0.77 | 0 | 7.36 ± 1.43 | 0 | < 1% |
| g′ (all frames) | 0.00009 | 0.0001 | 1.74 ± 0.28 | 0.00006 | 1.80 ± 0.29 | 0.171 | > 15% |
| Hα (2024-06-13)1 | 0.11820 | 0 | 7.09 ± 1.25 | 0 | 12.99 ± 6.08 | 0.007 | 5% |
| g′ (2024-06-13)1 | 0.94831 | 0.0554 | 1.80 ± 0.53 | 0.02635 | 2.13 ± 0.82 | 0.748 | > 15% |
| Validation star | |||||||
| Hα (all frames) | 0.3534 | 1 | 0.37 ± 0.08 | 1 | 0.37 ± 0.08 | 0.034 | > 15% |
| g′ (all frames) | 0.00016 | 0.4352 | 1.00 ± 0.16 | 0.32832 | 1.05 ± 0.18 | 0.596 | > 15% |
| Hα (2024-06-13)1 | 0.00057 | 0.9988 | 0.10 ± 0.03 | 0.99603 | 0.14 ± 0.04 | 0.173 | > 15% |
| g′ (2024-06-13)1 | 0.49293 | 0.9628 | 0.17 ± 0.04 | 0.91712 | 0.24 ± 0.09 | 0.518 | > 15% |
Notes. ADF refers to the augmented Dickey-Fuller stationary test. KS and AD refer to the Kolmogorov-Smirnov and Anderson-Darling test of normality, respectively. For the null hypothesis to be consistent with a noisy constant, we consider two constant models: weighted (by errors) mean and weighted median. Uncertainties (due to different numbers of epochs) for χ2 are generated using the bootstrap technique. The second part of the table shows the remaining variability level after flux correction for the weighted mean validation star at the same faint flux regime as the AGN. The p-value threshold to reject the null hypothesis is pval < 0.05.
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