E_tot vs. E_WVSC1 (left panel) for the best selection criteria and 1 /η as a function of time interval mean among the measurements ΔT (right panel). In the left panel, the statistical parameters X(EIQR) (blue lines), X(D_σμ) (red lines), and X(ED) (dark lines) for ZYJHK (full lines) and K (dashed lines) wavebands, respectively. In the same diagram the results found for using the mean (full grey line) and even-mean (dashed grey line), respectively, are also plotted. The results for normal, uniform, Ceph, RR, and EB simulated distributions are shown in the right panel. The colours indicate different parameters or distributions analyzed, which are indicated at the top of each diagram. In the right panel we show how 1 /η varies with the selection of ΔT. The box plot indicates the quartiles of WFCAM and WVSC1 samples, where each box encloses 50% of the sample under the grouping algorithm that defines ΔT in Sokolovsky et al. (2017).