Fig. 27.
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Comparison of the mean spectra obtained for a QSO with a strong emission line (Gaia DR3 1255795527649038720 in blue), and another source with similar shape and flux level but without strong features (Gaia DR3 4689627408431598336 in orange). BP and RP are shown in the left and right panels, respectively. Sampled spectra are shown in the top panels, while the bottom panels show the corresponding coefficients.
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