VLA ELAIS N1-N3: 20-cm Radio Source Catalog for Infrared Survey Regions

867 radio sources detected at 1.4 GHz (20 cm) by the Very Large Array in C configuration, covering a total area of 4.222 square degrees. The catalog includes 921 components, with 428 sources forming a complete sample in the flux range 0.2 - 1.0 mJy, and was created to support the European Large-Area ISO Survey (ELAIS). It was published by NASA and last updated in March 2026.

Use Cases

• Cross-matching radio sources with far-infrared counterparts based on the survey's alignment with ELAIS regions.
• Analyzing source reliability and completeness by comparing with the NVSS and FIRST surveys as described.
• Studying resolution-dependent surface brightness effects in interferometric radio surveys using the intermediate ~15 arcsecond resolution.
• Investigating the faint radio source population in the flux density range from 0.135 mJy to 1.15 mJy.

Strengths

• Provides a detailed comparison with NVSS and FIRST surveys, quantifying completeness (96% and 89%) and reliability (99% and 94%).
• Covers a significant area of 4.222 square degrees with varying depth, reaching a 5-sigma limit as low as 0.135 mJy in parts.
• Catalog contains 867 total sources with 921 components, including a defined complete subsample of 428 sources.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Flux limit varies over the surveyed area, which may complicate uniform statistical analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations made with the Very Large Array (VLA) radio telescope at 1.4 GHz in C configuration.

Time Range

null

Freshness

Last updated 2026-03-13 19:03:18.261006; freshness should be verified.

Geography

Three ISO ELAIS survey regions in the Northern celestial hemisphere: N1, N2, and N3.