Search for pulsations with life times shorter than the observing runs: each panel shows the peaks with amplitude higher than 3.3σ, detected in n subsets with same length, extracted from the three runs on G 185-32. Note that the detection limit varies from panel to panel as it goes with d ^− 1 / 2, where d is the duration of each subset. In this plot, the 4σ detection threshold goes from a relative amplitude of  ~5 × 10^-4 (lower panel) to about 6 × 10^-3 (upper panel). Only for the online electronic version, the different colors refer to the different dates of the runs: green = 6 May, red = 7 May, blue = 18 May 2005.