COSMOS2020 Classic: Photometry and Redshift Catalog for 1.7 Million Sources
Updated 3mo ago
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Description
1.7 million sources in the 2 square degree COSMOS field are cataloged with multi-wavelength photometry. Approximately 966,000 sources have measurements from all available broad-band data using both aperture and profile-fitting photometry. Photometric redshifts are computed for all sources using two independent codes, LePhare and EAZY, with sub-percent precision for bright sources.
Use Cases
Train photometric redshift estimation models based on the multi-wavelength photometry.
Compare galaxy properties based on the two independent photometric redshift codes, LePhare and EAZY.
Benchmark source detection algorithms using the catalog of 1.7 million identified sources.
Analyze photometric measurement techniques using the traditional aperture and profile-fitting (The Farmer) data.
Strengths
Covers 1.7 million sources, providing a large sample for statistical analysis.
Approximately 966,000 sources have measurements from all available broad-band data.
Photometric redshifts are computed with two independent codes for validation.
Achieves sub-percent photometric redshift precision for sources brighter than i < 21 magnitude.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Row count is unknown, which may limit suitability assessment.
Provenance
Source
National Aeronautics and Space Administration
Collection Method
Source detection and photometry performed on the COSMOS field; photometric redshifts computed using LePhare and EAZY.
Time Range
null
Freshness
Last updated 2026-03-13 19:07:45.442618; freshness should be verified.
Geography
Covers the 2 square degree COSMOS field.
License is listed as 'other-license-specified'; specific terms must be reviewed before use.