Spin magnitude posterior samples demonstrating the three classes of events discussed in Figure 10 above. The left-hand panel illustrates a confidently spinning binary, which is clearly identified as a member of the spinning “bulk” population and whose low effective sample count in the spike is therefore unimportant. The middle panel illustrates a “likely” spinning event, defined by having less than a fraction 1/200 of its posterior samples in the region χ ₁, χ ₂ < 0.1. The right panel, finally, shows an event belonging to neither category; these remaining events are used to generate the green points in Figure 10 above.