VLA-COSMOS 3-GHz: 10,830 Radio Sources in a 2 Square Degree Deep Field Survey

384 hours of observations with the Karl G. Jansky Very Large Array (VLA) at 3 GHz produced this catalog of 10,830 radio sources down to a 5-sigma threshold. The survey covers the 2 square degree Cosmic Evolution Survey (COSMOS) field with a median rms of 2.3 μJy/beam at 0.75 arcsecond resolution. The catalog was created by the HEASARC in June 2017 based on the reference paper's data release.

Use Cases

• Statistical analysis of radio source counts based on the 10,830-source catalog.
• Astrometric calibration and validation using the 0.01 arcsecond accuracy estimate for bright sources.
• Spectral index studies by combining this 3-GHz data with the VLA-COSMOS 1.4-GHz Joint Project catalog.
• Completeness and bias correction modeling using the Monte Carlo simulations described in the paper.

Strengths

• Large sample of 10,830 radio sources for statistical robustness.
• Deep survey with a median rms sensitivity of 2.3 μJy/beam.
• High angular resolution of 0.75 arcseconds across a broad 2-GHz band.
• Astrometric accuracy estimated at 0.01 arcseconds for bright sources (S/N > 20).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The total fraction of spurious sources increases up to 24% in the 5.0 < S/N < 5.5 range for the full catalog.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC), based on CDS Catalog J/A+A/602/A1.

Collection Method

Observations from the Karl G. Jansky Very Large Array (VLA), processed with a multiscale, multifrequency synthesis algorithm.

Time Range

Observational period not specified; catalog created by HEASARC in June 2017.

Freshness

Last updated 2026-03-13 19:55:08.472318; freshness should be verified.

Geography

Covers the 2 square degree Cosmic Evolution Survey (COSMOS) field.