S/N for UHECR flux anisotropies from different combinations of data, namely UHECR AC in the leftmost panel, XC in the central panel, and the combination of all data in the rightmost panel. In each panel, the left half shows the cumulative S/N as a function of the maximum multipole, ℓ_max, whereas the right half is for the cumulative S/N as a function of the minimum multipole, ℓ_min. The horizontal dashed line marks the 3σ threshold for detection.