Frequency spectra of the goodness-of-fit parameter χ²/ν of least squares sine wave fit to our HARPSpol subexposure radial velocity data. The upper fit spectrum shows the fit spectrum to the measured data from Table 3. The lower spectrum is the fit spectrum after a sine wave with period 0.09291 d, amplitude 4.1 km s^-1, and appropriate phase has been subtracted from the measured radial velocities.