Locations in the diagram of two simulated microlensing events (sequences a1 and a2) and two simulated RCrB events (sequences e1 and e2). (a1) Blue squares: OGLE source SC4-267762 with t_E = 7.5 d. (a2) Red triangles: OGLE source SC33-553617 with t_E = 153.5 d. (e1) Green filled circles: RCrB with four dip events. (e2) Green open circles: same as sequence e1, but with a two-frequency pulsation added to the light curves. See text for more details. The parameters of the time series are the same as in Fig. 5, except for the noise level which ranges from σ_noise = 10 to 100 mmag by steps of 10 mmag (markers on each line, the bigger markers indicating the simulations with the smallest noise level of σ_noise = 10 mmag). All excess Abbe values are computed with ΔT_sub = 100 d. The horizontal dashed line is an guideline to and the diagonal dashed line an guideline to .