High Redshift Quasars in the ING Wide Field Survey

Details High Redshift Quasars in the ING Wide Field Survey High Redshift Quasars in the ING Wide Field Survey

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ingn....4...13s&link_type=abstract

The Newsletter of the Isaac Newton Group of Telescopes (ING Newsl.), issue no. 4, p. 13-15

Astronomy and Astrophysics

Astronomy

Wide Field Survey, Int, High Redshift Quasars.

Scientific paper

The 2.5m Isaac Newton Telescope (INT) is currently being used to carry out a series of wide field imaging programs under the generic title of the ING Wide Field Survey (WFS) project (McMahon et al., 2000; http://www.ing.iac.es/Astronomy/science/wfs/). The largest of the survey programs is the Wide Angle Survey which aims to observe 100 deg2 in a filter set analogous to that used by the Sloan Digital Sky Survey. The strategy for finding a z=5 quasar is to search for point sources which are absent in u' and g' images (due to the Lyman series limit), with a large r'- i' colour (suppression of the r' band by the Lyman-a forest) and fairly neutral i'-z' colour (very cool stars and brown dwarfs can generally be distinguished from quasars on the basis of a much redder i'-z' colour).

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