Compton y-map superimposed on the INT r′ band of PSZ2 G130.64+37.16. Blue contours correspond to the 4, 4.6, and 5.2 × 10⁻⁶ levels of the Compton y-map in this area. The nominal SZ pointing (red) is clearly closer to cluster 644-A (zoomed-in in the lower right region), which has 14 spectroscopic members and shows a velocity dispersion close to 1000 km s⁻¹; cluster 644-B (zoomed-in in the upper left region) is away from the SZ center, but the MILCA y-map shows that the contours are elongated along this counterpart location, which is twice as rich as that of 644-A. The position error in the Planck catalog here is , which is more than twice the mean position error.