Multicolor detection of high-redshift quasars, 1: Two objects at Z greater than 4

Details Multicolor detection of high-redshift quasars, 1: Two objects at Z greater than 4 Multicolor detection of high-redshift quasars, 1: Two objects at Z greater than 4

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107...24s&link_type=abstract

The Astronomical Journal, vol. 107, no. 1, p. 24-27

Astronomy and Astrophysics

Astronomy

10

Active Galactic Nuclei, Galactic Evolution, Quasars, Red Shift, Star Formation, Stellar Color, Charge Coupled Devices, Color-Color Diagram, Imaging Techniques, Sky Surveys (Astronomy)

Scientific paper

We present detections of two quasars at z greater than 4, using a multicolor wide-field charge coupled device (CCD) imaging technique. The quasars were previously discovered in a photographic survey by Irwin, McMahon, and Hazard, but have not been fully documented in the literature. Here we provide the basic information on them, which can be used for a variety of followup studies. The wide-field CCD imaging technique is demonstrated to work well as a tool for discovery of high-redshift quasars, and could reach to magnitude levels deeper than those achieved by the Schmidt-plate based photographic surveys.

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