Fig. 4.

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Periods versus (B − V)0 (top) and (GBP − GRP)0 (bottom). Error bars are the σ value of the Gaussian fit to the minimum at the period in the PDM periodogram. Squares in (B − V)0 indicate magnitudes calculated from (GBP − GRP)0, while circles show magnitudes found in the UCAC4 and Gaia DR3 catalogs (top and bottom, respectively). Possible binaries are indicated in blue.
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