Fig. 5
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AAVSO lightcurve of V Hya recorded since 1913, displaying six evenly spaced dimming events. The blue curve is the extrapolated spectroscopic orbit. The red regions are the observing epochs of sodium absorption (see Sect. 5.1) from the HERMES monitoring (filled rectangle), and from the observing dates of Lloyd Evans & Carter (1993, dashed rectangle).
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