Signals and spectra for α = (s₁ + s₂)∕r = 3s₁∕2r. This is the maximum value where (partial) eclipses always occur (case II); they appear strongest around ωt_k = π. The side bands in the spectrum are broadened due to the diminishing strength of the eclipses around other times. Top and bottom: and , with the same axes as in Fig. 3. Bottom figure: strongest eclipses (observed at quarter phase) are weaker compared to those (observed at full phase) in the top figure.