COSMOS Photometry Catalog: I-Band Selected Multi-Color Catalog for 2 Square Degrees

COSMOS is an astronomical survey designed to probe galaxy formation and evolution as a function of cosmic time and large-scale environment. The catalog covers a 2 square degree equatorial field with imaging from major space-based and ground-based telescopes, detecting over 2 million galaxies spanning 75% of the age of the universe. This I-band selected multi-color catalog is provided by the National Aeronautics and Space Administration, with a detailed description in Capak et al. (2007).

Use Cases

• Model galaxy evolution over cosmic time based on redshift and environmental data.
• Train machine learning models for galaxy classification based on multi-color photometry.
• Conduct large-scale structure analysis based on the survey's wide-field coverage.
• Cross-match and validate observations using data from multiple telescope sources mentioned in the description.

Strengths

• Covers a 2 square degree equatorial field, providing a substantial observational area.
• Includes imaging data from multiple major telescopes (Hubble, Spitzer, GALEX, etc.), suggesting multi-wavelength coverage.
• Detects over 2 million galaxies, indicating a large sample size.
• Spans 75% of the age of the universe, offering deep temporal coverage for evolutionary studies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect observational bias inherent to the specific telescopes and field used.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Astronomical survey combining imaging from multiple space-based and ground-based telescopes.

Time Range

Spans 75% of the age of the universe.

Freshness

Last updated 2026-03-13 20:14:08.311409; freshness should be verified.

Geography

Centered on the COSMOS field at 10:00:28.6, +02:12:21 (equatorial).