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Overview of the DESI Legacy Imaging Surveys
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Cukanovaite, Elena and Gaensicke, B. T. (2019) Overview of the DESI Legacy Imaging Surveys. The Astronomical Journal, 157 (5). 168. doi:10.3847/1538-3881/ab089d ISSN 0004-6256.
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Official URL: https://doi.org/10.3847/1538-3881/ab089d
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.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Journal or Publication Title: | The Astronomical Journal | ||||||
| Publisher: | Institute of Physics Publishing, Inc. | ||||||
| ISSN: | 0004-6256 | ||||||
| Official Date: | 9 April 2019 | ||||||
| Dates: |
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| Volume: | 157 | ||||||
| Number: | 5 | ||||||
| Article Number: | 168 | ||||||
| DOI: | 10.3847/1538-3881/ab089d | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access |
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