Example of the capability of joint robust Fourier and TFA fit in disentangling stellar variability and measurement systematics. The target name and the type of the final data product are indicated in the header. The Fourier order is optimized at N_FOUR = 83. From the bottom to top: raw (SAP) LC from KEP; TFA and FOUR components; raw minus (TFA+FOUR) components – the periodic dips due to the transit signal emerge; folded LC with the best BLS period. Continuous black line: best fitting transit signal.