Dark Energy Survey Data Release 2
Publish Time:2024-11-30
Dark Energy Survey Data Release 2 (DES DR2) is a dataset captured by the Dark Energy Camera (DECam), which is mounted on the Blanco Telescope at the Cerro Tololo Inter-American Observatory in Chile. The data from DES DR2 originates from observations conducted between August 15, 2013, and January 9, 2019, spanning 681 distinct observation nights. The data primarily consists of wide-field imaging and time-domain project data, with the wide-field footprint designed to significantly overlap with the South Pole Telescope (SPT) survey and SDSS Stripe 82 to enhance overall calibration. DES DR2 includes 96,263 DECam exposures, of which 83,706 are part of the wide-field survey and 12,557 are part of supernova surveys and other projects. Characteristically, each location in DES DR2 is typically observed by 7-10 overlapping DECam exposures in the griz bands. The median point spread function (PSF) full width at half maximum (FWHM) across different bands are: g=1.11", r=0.95", i=0.88", z=0.83", and Y=0.90". The processing methods involve image processing, astrometric calibration, and photometric calibration. The data is processed through the DESDM pipeline, which includes image correction, astrometric calibration, and photometric calibration to ensure the consistency and accuracy of the data. In terms of quality, the exposures in DES DR2 have a median airmass of 1.2, with over 99% of the exposures having a airmass less than 1.4. All magnitudes in all bands are expressed in the AB system (Oke 1974), and all astrometric coordinates are provided in the Gaia-CRF2 reference frame (Gaia Collaboration 2018). The DES DR2 dataset has a wide range of applications, including the study of dark energy, mapping of the large-scale structure of the universe, research on galaxy evolution, and the distance estimation of Type Ia supernovae. Here we have both the image and catalog data. And these data are downloaded from https://desdr-server.ncsa.illinois.edu/despublic/dr2_tiles/. You can get the more detailed information through https://des.ncsa.illinois.edu/releases/dr2.
· Data Access ·
♦Introduction♦
Keywords
cosmology , dark energy , galaxy , star
Data Volume
25622366082791 Bytes
162678 files
♦Contact Author♦
Author
DESDM Team
Email
desaccess-admins(at)lists.ncsa.illinois.edu
♦Contact Publisher
♦
Email
support(at)china-vo.org
Phone
+86-10-64807973
Institution
National Astronomical Data Center
♦Rights♦
Standard Acknowledgement
This project used public archival data from the Dark Energy Survey (DES). 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, the 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, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico and the Ministério da Ciência, Tecnologia e Inovação, 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 Enérgeticas, Medioambientales y Tecnológicas–Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgenössische Technische Hochschule (ETH) Zürich, Fermi National Accelerator Laboratory, the University of Illinois at Urbana-Champaign, the Institut de Ciències de l'Espai (IEEC/CSIC), the Institut de Física d'Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig-Maximilians Universität München and the associated Excellence Cluster Universe, the University of Michigan, the National Optical Astronomy Observatory, the University of Nottingham, The Ohio State University, the OzDES Membership Consortium, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, and Texas A&M University.
Based in part on observations at Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation.
♦Tags♦
waveband
Optical
telescope or project
Dark Energy Survey
subject
Cosmology and Galaxies
Star and Interstellar Matter
data type
Image Data
Catalog Data
production age
1980-
content level
Research