| The Multi-Wavelength Quasar Survey IV. Quasars in the Leo Cluster |
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| 作者姓名： | Richard F. Green Wolfgang Voges |
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| 作者单位： | Large Binocular Telescope Observatory NOAO，Tucson，AZ85721，USA，Max-Planck-Institute fr Extraterrestrische Physik，D-85740 Garching，Germany |
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| 基金项目： | the National Natural Science Foundation of China. |
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| 摘 要： | We aim to providea 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.
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| 关 键 词： | galaxies: active: individual (Leo Cluster) — X-rays: galaxies: quasars |
The Multi-Wavelength Quasar Survey IV. Quasars in the Leo Cluster |
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| Richard F. Green,Wolfgang Voges.The Multi-Wavelength Quasar Survey IV. Quasars in the Leo Cluster[J].Chinese Journal of Astronomy and Astrophysics,2007(4). |
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| Abstract: | We aim to providea 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. |
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