Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1062l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, April 1992, p. 1062-1076.
Astronomy and Astrophysics
Astronomy
43
Quasars, Sky Surveys (Astronomy), Ultraviolet Astronomy, Astronomical Photometry, Astronomical Spectroscopy, Color-Color Diagram, Emission Spectra, Red Shift
Scientific paper
A sample of 97 UV excess (UVx) QSOs (MB is less than - 23) selected in the central 10 deg squared of the selected area 94 with B not greater than 19.9 mag is presented. The color-color (U - B vs B - V) diagram has been used to identify 200 low-redshift (z not greater than 2.2) QSO candidates. One hundred and eighteen extragalactic emission-line objects have been spectroscopically confirmed, including 14 Seyfert (MB not less than - 23) and 7 H II galaxies. The selection function of this survey as a function of the magnitude and redshift has been evaluated, corresponding to a total incompleteness of about 8 percent. The corrected computation of the QSO n(m) relation for z not greater than 2.2 is in good agreement with that of other surveys over all the common magnitude ranges.
Barbieri Cesare
Cristiani Stefano
La Franca Fabio
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