Tangential reduced shear profile (black solid circles) of Cl J120958.9+495352, measured around the X-ray peak. Here we combine the profiles of four magnitude bins between 24 < V_606,aper < 26, as done in S16. The curve shows the corresponding best fitting NFW model prediction constrained by fitting the data within the range 300 kpc ≤ r ≤ 1.5 Mpc, assuming the mass-concentration relation from Diemer & Kravtsov (2015). The gray open circles indicate the reduced cross-shear component, which has been rotated by 45 degrees and constitutes a test for systematics. These points have been shifted by dr = −0.05 Mpc for clarity.