Sizes of all the irregularities selected for all possible combinations of signs for Δν and , including cases in which one of the parameters was not detected (Δν = 0 or , which are plotted as crosses and the letter x, respectively). These results are for N_d = 10, and the known Vela glitches in the dataset were measured as for Fig. 2. The straight lines represent detection limits (no events expected in the shaded areas), as explained in Sect. 6.