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Fig. 1.

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Extent-extension likelihood plane that defines our criteria to select extended X-ray sources (see Paper I for further details). Top panel: RXGCC clusters, i.e., Gold+Silver+Bronze. Top-left, top-right, and bottom-left panels: sub-samples of RXGCC: Gold – new identified clusters; Silver – previous optical/infrared-identified clusters; Bronze – previous ICM-identified clusters. Bottom-right panel: false detections – spurious detections.

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