Probabilistic selection of high-redshift quasars

@article{Mortlock2011ProbabilisticSO,
  title={Probabilistic selection of high-redshift quasars},
  author={Daniel J. Mortlock and Mitesh Patel and Stephen J. Warren and Paul C. Hewett and Bram P. Venemans and Richard G. McMahon and Chris J. Simpson Imperial College London and University of Cambridge and European Southern Observatory and Liverpool John Moores University},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2011},
  volume={419},
  pages={390-410}
}
High-redshift quasars (HZQs) with redshifts of z ≳ 6 are so rare that any photometrically selected sample of sources with HZQ-like colours is likely to be dominated by Galactic stars and brown dwarfs scattered from the stellar locus. It is impractical to re-observe all such candidates, so an alternative approach was developed in which Bayesian model comparison techniques are used to calculate the probability that a candidate is a HZQ, Pq, by combining models of the quasar and star populations… 
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