Numerical correlation matrices of the 3D two-point correlation function first three even multipoles, derived from 1000 PLCs. The corresponding colour-bar is shown on the right. In the top panels the red diagonal separates the results for real space (upper triangles) and redshift space, with σ_z = 0 (lower triangles). In the bottom panels the red diagonal separates the results in photo-z space, where RSDs are included, for photo-z errors given by σ_z = 0.02(1 + z) (upper triangles) and σ_z = 0.05(1 + z) (lower triangles). In each panel the horizontal and vertical white solid lines separate the correlation sub-matrices of the monopole ξ₀(r), the quadrupole ξ₂(r), and the hexadecapole ξ₄(r), and their corresponding cross-correlations.