Quasars in the field of SA94. III - A colour survey

Details Quasars in the field of SA94. III - A colour survey Quasars in the field of SA94. III - A colour survey

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26as...77..161c&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 77, no. 2, Feb. 1989, p. 161-207.

Astronomy and Astrophysics

Astronomy

23

Color-Color Diagram, Quasars, Red Shift, Sky Surveys (Astronomy), Ubv Spectra, Astronomical Photometry, Astronomical Spectroscopy, Calibrating, Image Analysis

Scientific paper

A new sample of quasars has been selected in the central 10 square degrees of SA 94. The color-color U - B, B - V diagram has been used to identify low-redshift quasar candidates down to B = 19.8. Ninety-nine extragalactic emission-line objects have been spectroscopically confirmed. The quasar surface density for QSOs with z of not greater than 2.25 and other properties of this sample are derived and compared with other surveys.

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