Response of the galaxy sample to the change in galaxy magnitudes from magnification and dilution. The solid lines are calculated with Eq. (32) and the dashed lines are calculated using Eq. (4) and the approximation used in Eq. (32). The dashed black line shows the magnitude cut used for our magnification fields, which gives a value of ℛ/2 = 0.77. This leads to ℛ = 1.54, which we used to convert the galaxy overdensity field into a magnification field.