DESI Legacy Imaging Surveys

The DESI Legacy Surveys team is producing an inference model of the extragalactic sky in the optical and infrared. The original Legacy Surveys (MzLS, DECaLS and BASS) conducted dedicated observations of ~14,000 square degrees of extragalactic sky visible from the northern hemisphere in three optical bands (\(g,r,z\)), which was augmented with four infrared bands from NEOWISE.

Currently, the Legacy Surveys inference model is being self-consistently expanded to > 20,000 square degrees by incorporating additional public DECam data in extra optical bands (\(g,r,i,z\)) from the NOIRLab Data Archive.

The Beijing-Arizona Sky Survey (BASS)

The DECam Legacy Survey (DECaLS)

The Mayall z-band Legacy Survey (MzLS)

Extra DECam data (NOIRLab Archive)

An overview of the Legacy Surveys is available in Dey et al. (2019).

Interactive Map

Current Release: Data Release 10

December 2022



(see also the formal acknowledgment for publications)

The LBNL Physics Division is supported by the U.S. Department of Energy Office of Science High Energy Physics.

NSF's NOIRLab (National Optical-Infrared Astronomy Research Laboratory), the US center for ground-based optical-infrared astronomy, operates the international Gemini Observatory (a facility of NSF, NRC-Canada, ANID-Chile, MCTIC-Brazil, MINCyT-Argentina, and KASI-Republic of Korea), Kitt Peak National Observatory (KPNO), Cerro Tololo Inter-American Observatory (CTIO), the Community Science and Data Center (CSDC), and Vera C. Rubin Observatory (in cooperation with DOE's SLAC National Accelerator Laboratory). It is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with NSF and is headquartered in Tucson, Arizona.

The National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, provided staff, computational resources, and data storage for this project.

The Computational HEP program in The Department of Energy's Science Office of High Energy Physics provided resources through the "Cosmology Data Repository" project (Grant #KA2401022).

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