The Discovery of a High-Redshift Quasar without Emission Lines from Sloan Digital Sky Survey Commissioning Data

@article{Fan1999TheDO,
  title={The Discovery of a High-Redshift Quasar without Emission Lines from Sloan Digital Sky Survey Commissioning Data},
  author={Xiaohui Fan and Michael A. Strauss and James E. Gunn and Robert H. Lupton and C. L. Carilli and Michael P. Rupen and Gary D. Schmidt and Leonidas A. Moustakas and Marc Davis and James T. Annis and Neta A. Bahcall and Jonathan Brinkmann and Robert J. Brunner and Istv{\'a}n Csabai and Mamoru Doi and Masataka Fukugita and Timothy M. Heckman and Gregory S. Hennessy and Robert B. Hindsley and Željko Ivezi{\'c} and Gillian R. Knapp and Donald Q. Lamb and Jeffrey A. Munn and A. George Pauls and Jeffrey R. Pier and Constance M. Rockosi and Donald P. Schneider and Alexander S. Szalay and Douglas L. Tucker and Donald G. York},
  journal={The Astrophysical Journal Letters},
  year={1999},
  volume={526},
  pages={L57 - L60}
}
We report observations of a luminous unresolved object at redshift z = 4.62, with a featureless optical spectrum redward of the Lyα forest region, discovered from Sloan Digital Sky Survey commissioning data. The redshift is determined by the onset of the Lyα forest at λ ~ 6800 Å and a Lyman limit system at λ = 5120 Å. A strong Lyα absorption system with weak metal absorption lines at z = 4.58 is also identified in the spectrum. The object has a continuum absolute magnitude of -26.6 at 1450 Å in… 

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