eightnewquasarsdiscoveredbytheguoshoujingtelescopelamostinoneextragalacticfield

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	eightnewquasarsdiscoveredbytheguoshoujingtelescopelamostinoneextragalacticfield
	Wu Xuebing 5; Jia Zhendong 5; Chen Zhaoyu 5; Zuo Wenwen 5; Zhao Yongheng 4; Luo Ali 4; Bai Zhongrui 4; Chen Jianjun 4; Zhang Haotong 4; Yan Hongliang 4
刊名	researchinastronomyandastrophysics
	2010
卷号	000 期号:008 页码:745
ISSN号	1674-4527
英文摘要	We report the discovery of eight new quasars in one extragalactic field （a five-degree field centered at RA=08^h58^m08.2^s, Dec=01°32′29.7″） with the Guoshoujing Telescope （LAMOST） commissioning observations made on 2009 December 18. These quasars, with i magnitudes from 16.44 to 19.34 and redshifts from 0.898 to 2.773, were not identified in the SDSS spectroscopic survey, though six of them with redshifts less than 2.5 were selected as quasar targets in SDSS. Except for one source without near-IR Y-band data, seven of these eight new quasars satisfy a newly proposed quasar selection criterion involving both near-IR and optical colors. Two of them were found in the ＇redshift desert＇ for quasars （z from 2.2 to 3）, indicating that the new criterion is efficient for uncovering missing quasars with similar optical colors to stars. Although LAMOST encountered some problems during the commissioning observations, we were still able to identify 38 other known SDSS quasars in this field, with i magnitudes from 16.24 to 19.10 and redshifts from 0.297 to 4.512. Our identifications imply that a substantial fraction of quasars may be miss- ing in previous quasar surveys. The implication of our results to the future LAMOST quasar survey is discussed.
语种	英语
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/42100]
专题	中国科学院国家天文台
作者单位	1.中国科学院上海天文台 2.Center for Astrophysics, University of Science & Technology of China 3.中国科学院 4.中国科学院国家天文台 5.北京大学
推荐引用方式 GB/T 7714	Wu Xuebing,Jia Zhendong,Chen Zhaoyu,et al. eightnewquasarsdiscoveredbytheguoshoujingtelescopelamostinoneextragalacticfield[J]. researchinastronomyandastrophysics,2010,000(008):745.
APA	Wu Xuebing.,Jia Zhendong.,Chen Zhaoyu.,Zuo Wenwen.,Zhao Yongheng.,...&Shen Shiyin.(2010).eightnewquasarsdiscoveredbytheguoshoujingtelescopelamostinoneextragalacticfield.researchinastronomyandastrophysics,000(008),745.
MLA	Wu Xuebing,et al."eightnewquasarsdiscoveredbytheguoshoujingtelescopelamostinoneextragalacticfield".researchinastronomyandastrophysics 000.008(2010):745.