Alias test for the ~ 15 d and ~ 14.3 d periods using the posterior samples from the RV-only fits. We took 5000 posterior samples of the second component from the 2P + dSHO − GP_120d models to produce synthetic periodograms (black lines), which can be compared with the periodogram of the observed data (red lines). The results for the model considering an ~ 15 d signal are shown in the first row, and the results for the ~ 14.3 d signal are in the second row, with each period indicated by a vertical blue dashed line, respectively. Black lines depict the median of the samples for each simulation, and the grey shaded areas are the 50, 90, and 99% confidence intervals. Furthermore, the phases of the peaks as measured from the GLS are displayed in the circles, following the same colour scheme (the grey shades denote the standard deviations of the simulated peaks).