RP for several observations of IGR J17091-3624 from Table 1. 1. Row: left − SIMS/HIMS state 02-00 (left upper corner in blue) and ρ state 06-02 (right lower corner in red). Long diagonal lines appear in red RP. Right − the zoom of preceding plot. The diagonal lines are affected by the noise in such a way that the apparently long lines are composed of shorter square-shaped pieces. Next rows: in the red right lower halves of each plot RP are plotted for observations 04-01 (2. row left, IVS state), 04-02 (2. row right, ρ-state), 05-02 (3. row left, SIMS state) and 07-01 (3. row right, ρ-state). In the left upper half of each plot one of the corresponding surrogates is shown in green.