The first four clusters presented in the electronic version of Table 3 classified as gold in ZooDR7 (Section 4.1). False colour-composite images are 3 × 3 arcmin with X-ray contours overlaid in blue. Corresponding X-ray images are shown below each optical image (lighter regions show areas of increased X-ray flux). The shape of the xapa-detected extended (point) source ellipses are highlighted in green (red). From left to right, the clusters are: XMMXCS J001737.4−005235.4 at z= 0.21; XMMXCS J010858.7+132557.7 at z= 0.15; XMMXCS J083454.8+553420.9 at z= 0.24; and XMMXCS J092018.9+370617.7 at z= 0.21.