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Fig. 7

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Distribution of the SQ statistic (see text) applied to the V-band light curves of all stars in our sample (black filled circles). A blue horizontal line marks the threshold of SQ = 0.3 below which we inspected the light curves for periodic variability. The locations of the confirmed variables in our sample are marked with red filled circles; V7 is not shown as it does not appear to be periodic, but rather shows long-term variability.

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