Center-to-limb variations of the displacement (in arcsec) of the cross-correlation peak of linear polarization and granulation images. Left panel: for the FeI 630.15 nm line. Right panel: for the FeI 630.25 nm line. The displacements have been divided by sin(θ) to correct the perspective effect from the projection on the plane of the sky. Results obtained in the northern (southern) hemisphere are shown as a function of sinθ (− sinθ).