COSMOS VLA Catalog: 327MHz Radio Sources in a 2 Square Degree Field

COSMOS is a 2 square degree equatorial astronomical survey probing galaxy evolution. The Very Large Array 90 cm imaging covers 3.14 square degrees, producing a catalog of 182 radio sources down to 5.5 sigma, including 30 multicomponent sources. The dataset is provided by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Identify and catalog radio sources based on 327 MHz Very Large Array imaging.
• Study galaxy evolution and large-scale structure based on the COSMOS survey's multi-wavelength environment.
• Analyze multicomponent radio sources based on the 30 such objects listed in the catalog.
• Cross-match radio detections with optical/infrared data from Hubble, Spitzer, and other telescopes mentioned in the survey.

Strengths

• Catalog contains 182 sources extracted down to a 5.5 sigma detection threshold.
• Imaging covers a circular area of 3.14 square degrees with specified angular resolution (8.0 by 6.0 arcsec) and average noise (0.5 mJy/beam).
• Part of the broader COSMOS survey, which includes data from major space and ground-based telescopes and spans 75% of the age of the universe.

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

Radio imaging from the Very Large Array at 327 MHz (90 cm), with sources extracted from the resulting map.

Time Range

Spans 75% of the age of the universe, as per the COSMOS survey description.

Freshness

Last updated 2026-03-13 18:01:43.187854; freshness should be verified.

Geography

Covers the 2 square degree COSMOS equatorial field.