The 4MOST–Gaia Purely Astrometric Quasar Survey (4G-PAQS)
The 4MOST–Gaia Purely Astrometric Quasar Survey (4G-PAQS) will carry out the first large-scale, colour-independent quasar survey selected solely on the basis of astrometry from Gaia. Our main objective is to quantify the selection effects of current colour-selected samples. These colour-selected samples bias our view of the neutral gas and its
Krogager, J. -K. et al.
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3
2023