COSMOS 3GHz AGN Catalog: Classification and Properties for 7,903 Radio Sources

The VLA-COSMOS 3 GHz AGN catalog provides classification and selected physical properties for 7,903 radio sources with optical and near-infrared counterparts. It was produced by the National Aeronautics and Space Administration and is associated with the Delvecchio et al. (2017) publication. The dataset was last updated in March 2026.

Use Cases

• Classify active galactic nuclei (AGN) based on radio and optical/NIR counterpart data.
• Analyze the physical properties of a large sample of radio sources.
• Train or validate machine learning models for astronomical source classification using cataloged features.
• Conduct statistical studies on AGN populations within the COSMOS survey field.

Strengths

• Contains 7,903 sources, providing a substantial sample for analysis.
• Includes classification and multiple physical properties for each source.
• Associated with a peer-reviewed publication (Delvecchio et al., 2017).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is known, but specific column definitions and data types are not provided in the metadata.
• Data may reflect observational biases inherent to the VLA-COSMOS survey.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observational data from the VLA-COSMOS 3 GHz radio survey, cross-matched with optical/NIR counterparts.

Time Range

Associated with the 2017 publication; specific observational dates are not provided in the metadata.

Freshness

Last updated 2026-03-13 19:09:02.150002; freshness should be verified.

Geography

Covers the COSMOS survey field, a well-studied extragalactic region.