Comparison of the linear and <mono>HALOFIT</mono> matter power spectrum for the auto- and cross-correlation (left and right, respectively). We note that the shot noise is reported for each multipole separately, while the correlation signal is calculated in the bins of 50 multipoles. The solid lines show the best-fit results with different 3D power spectrum models, while dashed lines show the models with the same resulting best-fit parameters as obtained for solid lines, but with only matter power spectrum changed to the other model. Hence, the difference between the corresponding solid and dashed lines stems only from a difference between linear and <mono>HALOFIT</mono> models. The vertical dashed lines mark the multipole ranges used in this analysis: the fiducial 50 ≤ ℓ ≤ 250 and 50 ≤ ℓ ≤ 500, as well as larger 50 ≤ ℓ ≤ 500 and 50 ≤ ℓ ≤ 800, for and respectively. The fits shown here were made on the fiducial multipole range, where differences between the linear and <mono>HALOFIT</mono> models are between 1σ – 2σ of errors on data measurements.