Fig. 17.

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Comparison between the internally calibrated BP (in blue) and RP (in red) spectra vs. the SDSS (in grey) spectrum for QSO Gaia DR3 578415237301611520 (SDSS thing_id = 144680521). Dashed lines are used for the truncated spectra (using only 3 bases for BP and 11 for RP), while continuous lines show the spectra obtained using the full set of 55 coefficients.
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