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We derived additional pulsation frequencies in the HADS star V965 Cep from the frequency analysis of the O − C diagram built with the TESS Quick-Look Pipeline (QLP) data and from the TESS QLP light curve. Thus, the star appeared to be a multi-mode pulsator with a modulated light curve, similar to RR Stars with the Blazhko effect.
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Pyatnytskyy et al. (2024) studied this question.
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