Left panel: VLA-COSMOS 10913, with a LAS ∼ 1.5 arcmin is one of the largest source in the sample. Consequently, the bandwidth should be large to recover a proper fit. When using an intermediate value of 0.5, the algorithm splits the source into two clusters (see red and green coloured pixels in the skeleton). Right panel: on the contrary, in the case of VLA-COSMOS 10958 with LAS ∼ 5 arcsec the bandwidth should be small. When using a high value of 0.9, the algorithm associate this source with another nearby extended (but unrelated) source in the field. Different colours represent the different groups/clusters identified by the algorithm. Squares show the position of the compact radio sources identified with BLOBCAT (Hales et al. 2012).