Diagram for the period as a function of the extinction-corrected Ks (top panel) and absolute M_Ks (bottom panel) magnitudes. The VSX variable types are highlighted. VSX types with fewer than ten stars were removed because they are not statistically relevant. The group called LPV (long-period variables) was removed because the measurement of its period in the VSX catalogue has low precision. Contours represent the 68th percentile (the contour colour differs from the point colour) of the types with more than 100 points and are represented as RRAB by the yellow contour, RRC in dark green, PULS in cyan, CWB in gray, MISC in blue, SR by the purple line, and VAR by the golden line. The vertical dashed purple lines represent the separation limits between DSCT and RRC (log P = −0.65), RRC and RRAB (log P = −0.38), above RRAB (log P = 0), and SR from short-period variables (log P = 1.24). The number N in the bottom panel is the total number of variables shown.