First-order coefficients in Eq. (15) for a set of central nodes with log g = 4, [Fe/H]  = 0, and vsini = 20, but with different T_eff-values as indicated on the x-axis. The y-axis labels identify the deviating AP in each frame. The ordinate values represent the TME-contribution (in   km   s^-1) of this AP if it deviates by one step (see Eq. (14)) from the central node. The run of the coefficients is given for slightly oversampled (left frame) and slightly undersampled (right frame) spectra with an instrumental resolution of 11 500, and for the three measurement methods as indicated on top. The gap at 8000 K is due to the fact that different atmospheric models were used for temperatures above and below this value; incidentally it illustrates the sensitivity of Doppler-shift measurements to the templates used.