S/N maps for the joint detection that matches SPT-CLJ0351-4109, an SPT cluster not detected by Planck situated at z = 0.68 with M₅₀₀ = 4.26 × 10¹⁴ M_⊙. The three colour images show the S/N corresponding to the SZ filtered maps (left), the X-ray filtered map (middle), and the joint filtered maps (right). The filter size is 0.8 arcmin, which provides the best S/N for this detection. The angular size of the images is 68.7 arcmin. The RASS exposure time at the position of the detection is 545 s.