The multi-wavelength quasar survey - IV. Quasars in the Leo cluster

被引:1
|
作者
Chen, Yang [1 ]
Bai, Yu
He, Xiang-Tao
Wu, Jiang-Hua
Wang, Jing
Li, Qing-Kang
Sun, Yan-Chun
Green, Richard F.
Voges, Wolfgang
机构
[1] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
[2] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
[3] Natl Opt Astron Observ, Large Binocular Telescope Observ, Tucson, AZ 85782 USA
[4] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
来源
关键词
galaxies : active : individual (Leo Cluster); X-rays : galaxies : quasars;
D O I
10.1088/1009-9271/7/4/17
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We aim to provide a quasar sample that is more complete than any previous surveys by using a combined selection technique to reduce the selection effects. Here we present the observational results for the X-ray candidates in the field of the Leo Cluster. We found 33 X-ray AGNs in this field of which 10 are new discoveries. The X-ray data and optical spectra of these AGNs are given. We also study the near-IR properties of the X-ray-selected AGNs by using the data from 2MASS. Most of the AGNs in our sample span the color range 0.0 < B - J < 2.5, 1.0 < J - K-s < 2.0 and 0.5 < H - K-s < 1.2.
引用
收藏
页码:595 / 600
页数:6
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