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Fig. 4.
ASAS-3 V-filter light curve of HD 5980 phased with the orbital period of 19.2656 d. The time of the periastron passage corresponds to phase 0.0. Red circles denote averages of brightness calculated in the 0.03 phase bins. The heartbeat is clearly visible at the same phase (∼0.05) as in the TESS data (Fig. 2).
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