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Title: | Overview of the DESI legacy imaging surveys |
Authors: | Arjun Dey Schlegel, David J Lang, Dustin Blum, Robert Kaylan Burleigh Fan, Xiaohui Findlay, Joseph R Finkbeiner, Doug Herrera, David Juneau, Stephanie Landriau, Martin Levi, Michael McGreer, Ian Meisner, Aaron Myers, Adam D Moustakas, John Nugent, Peter Patej, Anna Schlafly, Edward F Walker, Alistair R Valdes, Francisco Weaver, Benjamin A Yeche, Christophe Zou, Hu Zhou, Xu Abaresh, Behzad Abbott, T. M. C Abolfathi, Bela Aguilera, C Alam, Shadab Allen, Lori Alvarez, A Annis, James Ansarinejad, Behzad Aubert, Marie Beechert, Jacqueline Bell, Eric F BenZvi, Segev Y Beutler, Florian Bielby, Richard M Bolton, Adam S Briceno, Cesar Buckley-Geer, Elizabeth J Butler, Karen Calamida, Annalisa Carlberg, Raymond G Carter, Paul Casas, Ricard Castander, Francisco J Choi, Yumi Comparat, Johan Cukanovaite, Elena Delubac, Timothee DeVries, Kaitlin Dey, Sharmila Dhungana, Govinda Dickinson, Mark Ding, Zhejie Donaldson, John B Duan, Yutong Duckworth, Christopher J Eftekharzadeh, Sarah Eisenstein, Daniel J Etourneau, Thomas Fagrelius, Parker A Farihi, Jay Fitzpatrick, Mike Font-Ribera, Andreu Fulmer, Leah Gansicke, Boris T Gaztanaga, Enrique George, K and 89 co-authors |
Keywords: | Catalogs Surveys |
Issue Date: | May-2019 |
Publisher: | IOP Publishing |
Citation: | The Astronomical Journal, Vol. 157, No. 5, 168 |
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. |
Description: | Restricted Access © The American Astronomical Society https://doi.org/10.3847/1538-3881/ab089d |
URI: | http://prints.iiap.res.in/handle/2248/7232 |
ISSN: | 1538-3881 |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Overview of the DESI Legacy Imaging Surveys.pdf Restricted Access | 9.34 MB | Adobe PDF | View/Open Request a copy |
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