Fig. 15

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Correlations of the Δ(CduC-Gaia) coordinate differences between single- and triple-exposure plates for non-single-star candidates. The candidates are the EDR3-based sources in the ‘correlation’ S4 sample, that is, sources for which the Δ(CduC-Gaia) coordinate difference is >0.4″ (Sect. 3.3). Panels a, b, and c show the correlations for RA coordinate difference, Dec coordinate difference, and total coordinate difference, respectively. The straight lines show a one-to-one correlation.
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