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    • COSMOS2020 Classic Catalog

    Metadata Updated: February 6, 2026

    In these catalogues, source detection and multi-wavelength photometry is performed for 1.7 million sources in the 2 square degree COSMOS field. Approximately 966,000 of these sources are measured with all available broad-band data using both traditional aperture photometry and a new profile-fitting photometric tool, The Farmer, developed by the COSMOS team. Photometric redshifts are computed for all sources in each catalogue using two independent photometric redshift codes, LePhare and EAZY. At i < 21, sources have sub-percent photometric redshift precision and even the faintest sources at 25 < i < 27 reach a photometric redshift accuracy of 5%.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date February 6, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date February 6, 2026
    Publisher NASA/IPAC Infrared Science Archive
    Maintainer
    Identifier ivo://irsa.ipac/cosmos/catalog/cosmos2020c
    Data Last Modified 2026-02-03
    Category Astrophysics
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 2d83e111-f4cf-469f-82ce-7c771b83fa46
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://irsa.ipac.caltech.edu/data/COSMOS/gator_docs/cosmos2020c_colDescriptions.html
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash 5321a516919c3c23463852a8ca3a8a0c48f39d4ddc6dc7579d19adcb8200a2de
    Source Schema Version 1.1

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