The Legacy Surveys Sky Viewer web sites viewer.legacysurvey.org and legacysurvey.org/viewer provide images from a number of surveys who have publicly released their data. Each survey has its own copyright and licensing terms, links to which are available in the bottom-right corner of the viewer web page.
Links to these surveys' image use policies and licensing terms are provided here as a courtesy. We do not guarantee these are the relevant documents; most surveys have statements about images published on their web sites, but not on renderings produced from their public data releases. For any usage of images, the user is responsible for ensuring that they are in compliance with any licensing terms for the relevant layer.
- SDSS - https://www.sdss.org - https://www.sdss.org/collaboration/#image-use
- DES DR1 - https://www.darkenergysurvey.org/ - https://des.ncsa.illinois.edu/terms
- HSC DR2 - https://hsc-release.mtk.nao.ac.jp/doc/index.php/tools-2/ - https://www.nao.ac.jp/en/policy-guide.html
- VLASS 1.2 - https://public.nrao.edu/vlass/ - https://public.nrao.edu/media-use/
- GALEX - http://www.galex.caltech.edu/ - https://www.jpl.nasa.gov/imagepolicy/
- Halpha - https://faun.rc.fas.harvard.edu/dfink/skymaps/halpha/
- SFD - https://dustmaps.readthedocs.io/en/latest/maps.html#sfd
- WISE 12 um dust map - http://wise.skymaps.info/
For the layers produced by the Legacy Surveys and unWISE teams, including "Legacy Surveys", "DECaLS", "MzLS+BASS", "DECaPS" and "unWISE" layers, the copyright and license statement is:
Images are licensed under a Creative Commons Attribution 4.0 International License, and hence may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible. The credit must be presented in a clear and legible manner to all users, with the wording unaltered as “Legacy Surveys / D. Lang (Perimeter Institute)” for Legacy Surveys layers and "unWISE / NASA/JPL-Caltech / D. Lang (Perimeter Institute)" for unWISE layers. The credit should not be hidden or disassociated from the image footage. Links should be active if the credit is online.
When using data from the Legacy Surveys in papers, please use the following acknowledgment:
The Legacy Surveys consist of three individual and complementary projects: the Dark Energy Camera Legacy Survey (DECaLS; Proposal ID #2014B-0404; PIs: David Schlegel and Arjun Dey), the Beijing-Arizona Sky Survey (BASS; NOAO Prop. ID #2015A-0801; PIs: Zhou Xu and Xiaohui Fan), and the Mayall z-band Legacy Survey (MzLS; Prop. ID #2016A-0453; PI: Arjun Dey). DECaLS, BASS and MzLS together include data obtained, respectively, at the Blanco telescope, Cerro Tololo Inter-American Observatory, NSF’s NOIRLab; the Bok telescope, Steward Observatory, University of Arizona; and the Mayall telescope, Kitt Peak National Observatory, NOIRLab. The Legacy Surveys project is honored to be permitted to conduct astronomical research on Iolkam Du’ag (Kitt Peak), a mountain with particular significance to the Tohono O’odham Nation.
NOIRLab is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation.
This project used data obtained with the Dark Energy Camera (DECam), which was constructed by the Dark Energy Survey (DES) collaboration. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and the Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche Forschungsgemeinschaft and the Collaborating Institutions in the Dark Energy Survey. The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgenossische Technische Hochschule (ETH) Zurich, Fermi National Accelerator Laboratory, the University of Illinois at Urbana-Champaign, the Institut de Ciencies de l’Espai (IEEC/CSIC), the Institut de Fisica d’Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig Maximilians Universitat Munchen and the associated Excellence Cluster Universe, the University of Michigan, NSF’s NOIRLab, the University of Nottingham, the Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, and Texas A&M University.
BASS is a key project of the Telescope Access Program (TAP), which has been funded by the National Astronomical Observatories of China, the Chinese Academy of Sciences (the Strategic Priority Research Program “The Emergence of Cosmological Structures” Grant # XDB09000000), and the Special Fund for Astronomy from the Ministry of Finance. The BASS is also supported by the External Cooperation Program of Chinese Academy of Sciences (Grant # 114A11KYSB20160057), and Chinese National Natural Science Foundation (Grant # 11433005).
The Legacy Survey team makes use of data products from the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE), which is a project of the Jet Propulsion Laboratory/California Institute of Technology. NEOWISE is funded by the National Aeronautics and Space Administration.
The Legacy Surveys imaging of the DESI footprint is supported by the Director, Office of Science, Office of High Energy Physics of the U.S. Department of Energy under Contract No. DE-AC02-05CH1123, by the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility under the same contract; and by the U.S. National Science Foundation, Division of Astronomical Sciences under Contract No. AST-0950945 to NOAO.
When using data from the Photometric Redshifts for the Legacy Surveys (PRLS) catalog, please include the following additional acknowledgment:
The Photometric Redshifts for the Legacy Surveys (PRLS) catalog used in this paper was produced thanks to funding from the U.S. Department of Energy Office of Science, Office of High Energy Physics via grant DE-SC0007914.