Example of radial velocity measurements of γ Psc in September 2010 (top panel) and θ¹ Tau in November 2010 (bottom panel). The data sets of HERMES, HIDES, CORALIE, and SOPHIE are shown in red, blue, green, and cyan, respectively. The full data set is depicted in Fig. 2. The radial velocities of θ¹ Tau have been detrended for the binary orbit, shown in Fig. 4. The grey line indicates the 16.57 d modulation of the radial velocities, found in θ¹ Tau.