Comparison of the fraction of realisations with a Bayes factor greater than a threshold as a function of the assumed threshold found using the cosine or generic periodic kernels. Dark blue and red lines show the results obtained with the cosine kernel for the PTF and ideal baselines, respectively. Blue and orange lines show the results obtained with the generic periodic kernel for the PTF and ideal baselines, respectively. Solid lines refer to sinusoidal modulations while dashed lines refers to sawtooth modulations.