log f_0plx vs. Gaia G-band magnitude (top row) and log f_0pm vs. Gaia G-band magnitude (bottom row) distributions of the GoodQSO_Mag (blue) and GoodSTAR_Mag (red). The color bar in each subplot represents the number density of the distribution. Note: the color map in each subplot follows its own color bar, and thus, identical colors across different subplots do not represent equivalent number densities. All the subplots display only small parts of the whole distributions to exhibit the critical data region.