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Fig. 15

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The Swift XRT flux is plotted against the two-month Fermi-LAT flux for the sources included in the three high-energy flux-limited samples. Open red circles represent HSP sources, i.e., high synchrotron-peaked BL Lacs where the X-ray flux is dominated by synchrotron radiation. Filled black circles represent LSP sources, i.e., blazars with low synchrotron peak, for which the X-ray flux is dominated by inverse Compton radiation.

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