Table 2
Statistics of the RV-Log 
relationship.
| Categ. | Definition | NB | Perc. |
| (%) | |||
|
|
|||
| 1 | Good sampling, excellent correlation | 13 | 7.9 |
| 2 | Moderate sampling, good correlation | 48 | 29.0 |
| 3 | Weak correlation | 15 | 9.1 |
| 4 | Weak signals, no correlation | 70 | 42.4 |
| 5 | Strong Log , weak RV |
19 | 11.5 |
| 1–5 | 165 | – | |
|
|
|||
| 6 | Strong signals, no correlation | 12 | 28.6 |
| 7 | Strong signals, anticorrelation | 11 | 26.2 |
| 8 | Strong RV, weak Log |
19 | 45.2 |
| 6–8 | 42 | – | |
|
|
|||
| 9 | Strong RV, identified origin | 26 | – |
Notes. Number of stars in each category NB, for the selected stars (207). The percentages indicate the fraction with respect to 148 for categories 1–5 and 42 for categories 6–8. Category 9 corresponds to a strong RV signal with a known origin (mostly presence of planets). Correlation means between RV and Log time series; weak-strong signals are related to the amplitudes of RV and log , especially on long or median timescales, and not to the average level.
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