Top: normalized azimuthally averaged projected gravitational potential reconstructed from the X-ray (Eq. (9)) and from the SZ signal (Eq. (12)) of the g1-cluster, compared to the true projected potential. Blue: projected potential reconstructed from the SZ signal; Red: projected potential reconstructed from the X-ray signal; black: true projected potential. Bottom: relative residuals computed as (f_true (s) − f_Recons(s))∕f_true(s), with the corresponding uncertainties obtained with error propagation and no uncertainties on f_true (s).