Distribution of ESZ clusters and candidate clusters on the sky (Galactic Aitoff projection). Left panel: in blue are ESZ clusters identified with known clusters, in green the ESZ confirmed candidates, and in red the ESZ candidate new clusters yet to be confirmed. Right panel: in red diamonds the ESZ sample, in black crosses the compilation of SZ observations prior to 2010, in dark blue triangles ACT clusters from Menanteau et al. (2010), and in purple squares SPT clusters from Vanderlinde et al. (2010). The blue area represents the masked area of |b| < 14 deg.