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Fig. E.1

image

Phase-folded curves (using the photospheric absorption line period and phase, which is nearly identical to the He II 4686 Å period and phase) for the amplitude of the multi-Gaussian model used to fit the CaII IR lines. Top: NC. Middle: blueshifted BC. Bottom: redshifted BC. There is a marginal amplitude modulation of the BC amplitude.

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