Fig. 2

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Comparison of the Band I depth Rz − Ri and the spectral slope for Gaia (black) and the SDSS (green) asteroids. Panel A: comparison between the 60 518 asteroids of Gaia and the 33 584 asteroids of the SDSS. Panel B: comparison between a sub-sample of 14 129 asteroids both observed by the SDSS and Gaia. A shift in Rz − Ri between the spectra of Gaia and the SDSS is visible in both panels.
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