VLA-COSMOS: 3,643 Radio Sources at 1.4 GHz in a 2-Degree Field

The COSMOS survey covers a 1.4 by 1.4 degree equatorial field. This catalog contains 3,643 radio sources detected at 1.4 GHz with a signal-to-noise threshold >= 4.5, produced by the VLA-COSMOS Large Project and created by NASA HEASARC in September 2007. Observations resulted in a resolution of 1.5" by 1.4" and a mean rms noise of ~10.5 μJy in the central area.

Use Cases

• Identify and classify radio galaxies based on source morphology and component structure.
• Study the correlation between radio emission and galaxy environment within the COSMOS field.
• Train models to distinguish between point sources and extended, multi-component radio sources.
• Analyze the evolution of supermassive black hole activity over cosmic time using radio source properties.

Strengths

• Catalog contains 3,643 radio sources with a defined signal-to-noise threshold.
• Astrometry has been tested with relative uncertainty of 130 mas and absolute uncertainty < 55 mas.
• Observations provide high resolution (1.5" by 1.4") and low noise (~10.5 μJy) in the central region.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

NASA HEASARC, based on Table 3 from the reference paper.

Collection Method

Observations from the VLA A and C configurations.

Time Range

Observations likely correspond to the COSMOS survey timeframe (circa 2007).

Freshness

Last updated 2026-03-13 18:38:58.698013; freshness should be verified.

Geography

Covers the 2 square degree equatorial COSMOS field.