THE SA-94 QSO SURVEYS .5. AN UVX SAMPLE OF 97 QSOS WITH B LESS-THAN-OR-EQUAL-TO 19.9

被引:37
作者
LAFRANCA, F
CRISTIANI, S
BARBIERI, C
机构
[1] CNR,IST RADIOASTRON,I-40126 BOLOGNA,ITALY
[2] ROYAL OBSERV,EDINBURGH EH9 3HJ,MIDLOTHIAN,SCOTLAND
关键词
D O I
10.1086/116125
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a sample of 97 ultraviolet excess (UVx) QSOs (M(B) < -23) selected in the central 10 deg2 of the selected area 94 with B less-than-or-equal-to 19.9 mag. The color-color (U - B vs B - V) diagram has been used to identify 200 low-redshift (z less-than-or-equal-to 2.2) QSO candidates. 118 extragalactic emission-line objects have been spectroscopically confirmed, including 14 Seyfert (M(B) greater-than-or-equal-to -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 approximately 8%. The corrected computation of the QSO n(m) relation for z less-than-or-equal-to 2.2 is in good agreement with that of other surveys over all the common magnitude ranges.
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页码:1062 / 1076
页数:15
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