Normalized histograms of the sources selected with a constant cut-off value for (black line), and FL^(s) (red line), and and FM^(s) (blue line) indices. The E_tot values for each index is shown in parentheses. The upper panel shows the histograms for s = 2, while the lower panel shows the histograms for s = 3. The cut-off values were determined considering a value that includes 90% of WVSC1 stars (see Table 3).