Distribution on the sky of galaxies in the CALIFA mother sample (small open circles) and CALIFA DR2 sample (blue filled symbols). The upper panel shows the distribution in an Aitoff projection in J2000 Equatorial Coordinates (cut off at δ = −30°, below which the sample does not extend), while the middle panel is plotted in the Cartesian system. The lower panel shows both samples as a function of right ascension. The number distribution in bins of 30° along the right ascension is shown for the mother sample (gray area) and the DR2 sample (blue area).