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A Multi-Colour Survey for High-Redshift Quasars

Published online by Cambridge University Press:  19 July 2016

S.J. Warren ,
P.C. Hewett  and
M.J. Irwin
S.J. Warren
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 OHA United Kingdom
P.C. Hewett
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 OHA United Kingdom
M.J. Irwin
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 OHA United Kingdom

Abstract

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We describe how the application of techniques which utilise all the information contained in multi-colour surveys of stellar-like objects can be employed to detect quasars over an extended redshift range. The method is particularly effective for the identification of quasars with redshifts z>2.2 where the application of the ultra-violet excess criterion breaks down. Spectroscopy of a small sample of objects from the first survey field has resulted in the detection of two new faint quasars with redshifts z=3.42 and z=4.01 (ref. 1).

Type
Chapter XI: Quasi-Stellar Objects: Distribution and General Properties
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 661 - 664
Copyright
Copyright © Reidel 1987 

References

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