Overview of the DESI Legacy Imaging Surveys

doi:10.3847/1538-3881/ab089d

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	Overview of the DESI Legacy Imaging Surveys
	Dey,Arjun 60; Schlegel,David J.61; Lang,Dustin 62,63,64; Blum,Robert 60,65; Burleigh,Kaylan 61; Fan,Xiaohui 1; Findlay,Joseph R.2; Finkbeiner,Doug 3; Herrera,David 60; Juneau,Stéphanie 60
刊名	The Astronomical Journal
	2019-04-09
卷号	157 期号:5
关键词	catalogs surveys
ISSN号	0004-6256
DOI	10.3847/1538-3881/ab089d
英文摘要	Abstract The DESI Legacy Imaging Surveys (http://legacysurvey.org/) are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing–Arizona Sky Survey, and the Mayall z-band Legacy Survey) that will jointly image ≈14,000 deg2 of the extragalactic sky visible from the northern hemisphere in three optical bands (g, r, and z) using telescopes at the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory. The combined survey footprint is split into two contiguous areas by the Galactic plane. The optical imaging is conducted using a unique strategy of dynamically adjusting the exposure times and pointing selection during observing that results in a survey of nearly uniform depth. In addition to calibrated images, the project is delivering a catalog, constructed by using a probabilistic inference-based approach to estimate source shapes and brightnesses. The catalog includes photometry from the grz optical bands and from four mid-infrared bands (at 3.4, 4.6, 12, and 22 μm) observed by the Wide-field Infrared Survey Explorer satellite during its full operational lifetime. The project plans two public data releases each year. All the software used to generate the catalogs is also released with the data. This paper provides an overview of the Legacy Surveys project.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-6256-157-5-AB089D
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/26000]
专题	中国科学院国家天文台
作者单位	1.Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA 2.Department of Physics & Astronomy, University of Wyoming, 1000 E. University, Department 3905, Laramie, WY 8207, USA 3.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA 4.Department of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, USA 5.Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile 6.IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France 7.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 8.Department of Physics and Astronomy, University of California, Irvine, Irvine, CA 92697, USA 9.Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK 10.Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA
推荐引用方式 GB/T 7714	Dey,Arjun,Schlegel,David J.,Lang,Dustin,et al. Overview of the DESI Legacy Imaging Surveys[J]. The Astronomical Journal,2019,157(5).
APA	Dey,Arjun.,Schlegel,David J..,Lang,Dustin.,Blum,Robert.,Burleigh,Kaylan.,...&Zhou,Zhimin.(2019).Overview of the DESI Legacy Imaging Surveys.The Astronomical Journal,157(5).
MLA	Dey,Arjun,et al."Overview of the DESI Legacy Imaging Surveys".The Astronomical Journal 157.5(2019).