The PSD for corner case 1. The A-channel power spectral density of the sum of confused catalogue UCB waveforms (LDC0058924130+LDC0058923825) is in orange, and the LDC injected waveform (INJ005892423) that matches with the summed catalogue waveforms is the solid blue curve. The original data are in red, and residual is plot as a dashed blue curve. One can see from the red curve that there are at least two high S/N UCBs on either side of the graphed waveforms. Except for INJ005892423, all injected waveforms have been recovered.