Fig. 1.

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Distribution of RC and RGB giant stars in different classes of signal-to-noise ratios A, B, and C for the IR excess measured by the difference of WISE bands W1–W4 in magnitudes related flux densities expressed in Janskys (Jy) (first column) and for the Li abundance in dex (second column). Histograms of these distributions are presented in the right vertical and horizontal scales.
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