Table 2
Analysis of the dispersion of the bisector span.
| Star |  | max [%] |
|---|---|---|
| WASP-151 | 0.93 ± 0.15 | 84 |
| WASP-153 | 1.15 ± 0.12 | 22 |
| WASP-156 | 1.03 ± 0.11 | 48 |
Notes. std(BS) indicates the standard deviation of the BS measurements. ⟨σBS ⟩ indicates the average error bar on the individual BS measurements. Max(
) is the maximum fraction of the RV amplitude observed that the BS signal can have without producing a value of 
which is significantly superior than one (see Sect. 2.3.2 for more details).
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