First Results of a Deep Multicolor Survey for Quasars

Details First Results of a Deep Multicolor Survey for Quasars First Results of a Deep Multicolor Survey for Quasars

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.1112h&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #11.12; Bulletin of the American Astronomical Society, Vol. 24, p.1136

Astronomy and Astrophysics

Astronomy

Scientific paper

We present initial results from a survey for quasars underway at KPNO with the 4-m telescope. The primary goal of the survey is to study the luminosity function and space density of quasars at z>3 and of faint AGNs at z<3. We have imaged 0.75 of a square degree of sky using six filters spanning 300 to 900 nm to a limiting magnitude of V=23. Using various methods of identifying outliers in color-color space, we have selected candidates as faint as R=22 for spectroscopic followup. This followup has begun, using the HYDRA multifiber spectrograph on the KPNO 4-meter telescope. We will present studies of the effectiveness of various color-color selection techniques as well as spectra of quasars discovered to date.

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