中国天文和天体物理学报（英文版）
中國天文和天體物理學報（英文版）
중국천문화천체물이학보（영문판）
CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
2007年
4期
595-600
,共6页
galaxies: active: individual (Leo Cluster) - X-rays: galaxies: quasars
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-Ks ＜ 2.0 and 0.5 ＜ H-Ks ＜ 1.2.
