GALEX/COSMOS: Photometry Catalog for Galaxy Evolution Study

Over 2 million galaxies are detected in this catalog, spanning 75% of the age of the universe. It was created using u*-band priors and the EM-algorithm on GALEX NUV and FUV images covering the 2 square degree COSMOS equatorial field. The catalog is provided by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Study galaxy formation and evolution based on the survey's focus on cosmic time and redshift.
• Analyze the relationship between galaxies and their large-scale structural environment as described.
• Train or validate photometric measurement algorithms using the EM-algorithm and prior-based method described.
• Cross-match multi-wavelength observations using data from Hubble, Spitzer, and other telescopes mentioned.

Strengths

• Covers over 2 million galaxies, providing a large sample for statistical analysis.
• Spans 75% of the age of the universe, offering a long temporal baseline.
• Integrates observations from multiple major space-based and ground-based telescopes.

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

Created using u*-band priors and the EM-algorithm on GALEX pipeline intensity maps.

Time Range

Spans 75% of the age of the universe.

Freshness

Last updated 2026-03-13 18:40:35.347447; freshness should be verified.

Geography

Covers the 2 square degree COSMOS equatorial field.