Asteroid spectra acquired with VLT/X-shooter (black line). We further show the Gaia DR3 spectrum of each asteroid (grey markers), having removed the first and last Gaia data point. For asteroids (1426) Riviera and (3682) Welther, we removed values that are strongly affected by telluric absorption features (shaded grey area) and interpolated the spectra in these regions. For (3682) Welther, we further show the spectrum acquired by the S3OS2 survey (blue line) that we used to choose the alternative solar analogue spectrum (refer to text for details).