Left: the canvas (approximately 14,000 × 13,000 pixels) after stacking all 1118 images for some initial condition. The inset plot shows the lone peak above 7σ in the stack, which turns out to be a 21σ detection of 2003 BH₉₁. Since the asserted parameters are not quite correct, the detection is somewhat smeared. Right: a heat map of the number of images that contributed to each pixel in the significance image.