VLA SWIRE Deep Field: 20-cm Radio Source Catalog

Almost 140 hours of Very Large Array observations between December 2001 and January 2004 produced this deep radio source catalog at 1400 MHz. The catalog, created by NASA HEASARC in 2010, lists sources detected above a 5-sigma threshold from a region centered on the Spitzer SWIRE survey. It is described as the deepest survey in terms of radio source density, with an estimated six sources per square arcminute at 15 microJansky.

Use Cases

• Modeling radio source counts (log N-log S) based on flux density and source size corrections mentioned in the description.
• Studying the angular size distribution of faint radio sources relative to brighter counterparts.
• Investigating the natural confusion limit in deep radio surveys based on the described source density.
• Cross-matching radio sources with infrared data from the Spitzer SWIRE survey for multi-wavelength analysis.

Strengths

• Observations span almost 140 hours on-source using multiple VLA configurations.
• Catalog is derived from the deepest radio survey in terms of source density at the time.
• Final image has a high resolution of approximately 1.6 arcseconds.

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 CDS catalog J/AJ/136/1889/.

Collection Method

Radio observations with the Very Large Array (VLA).

Time Range

Observations conducted between 2001 December and 2004 January.

Freshness

Last updated 2026-03-13 20:01:55.664839; freshness should be verified.

Geography

Covers a region of the Spitzer SWIRE survey centered at RA 10:46:00, Dec +59:01:00 (J2000).