DESI Legacy Surveys DR9 Tractor Catalog
Publish Time:2020-01-31
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 sq. deg 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.
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INTRODUCTION
Keywords
DESI;photometry , catalog
CONTACT AUTHOR
Author
Email
help(at)legacysurvey.org
CONTACT PUBLISHER
Email
support(at)china-vo.org
Phone
+86-10-64807973
Institution
National Astronomical Data Center
TAGS
waveband
Infrared
Optical
telescope or project
Dark Energy Spectroscopic Instrument(DESI)
subject
Cosmology and Galaxies
data type
Catalog Data
Mirror Data
production age
1980-
content level
Research