Example of the automatic detection of ESE-like dips in the light curves. The lower panel shows the NDCF output for the light curve of the type IIb-SRV source 1830+285 (plotted in the upper panel). Events above the threshold of 0.4 (red horizontal line) are regarded as detections. Blue and brown vertical lines indicate, respectively, the time of minimum and maximum solar elongation of the source.