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.
Quasars in the Field of SA94 III. A Colour Survey
BARBIERI, CESARE;
1989
Abstract
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.File in questo prodotto:
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