Fig. 1
The RV curves and residuals (O−C) of BD−7°5977, EC 11031–1348, TYC 2084–448–1 and TYC 3871–835–1. The RVs of the cool companion are plotted in green filled circles, while those of the sdB are shown in open blue squares. The best fitting Keplerian orbit is shown in red full line for the cool companion and red dashed line for the sdB.
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