Photometric amplitude as a function of radial velocity amplitude for a star with axial inclination i = 15°. Curves are plotted for spot radii of rspot = 5°, 10°, and 15° with spot contrasts of Tphot–Tspot = ΔT = 400 and 500 K. The points defining each curve are for different spot latitudes ranging from 30° to 90° (at 0, 0) in steps of 5°. The observed photometric and spectroscopic amplitudes are denoted by the horizontal and vertical lines, respectively.