7C Catalog: 43,683 Radio Sources from the 151-MHz Unified Sky Survey

43,683 astronomical radio sources are cataloged in this final unified table from the 7C survey at 151 MHz. The NASA HEASARC created this table in October 2010 by amalgamating data from about 96 individual regions, resolving redundancies in overlapping areas. This catalog supersedes earlier publications for specific regions and provides a consolidated view of radio emissions.

Use Cases

• Cross-matching radio sources with optical or infrared catalogs based on the unified positional data.
• Statistical analysis of radio source populations and flux density distributions based on the 43,683 entries.
• Studying the structure of multiple-component radio sources based on the described beam-fitted flux density differences.
• Mapping radio sky coverage and survey completeness limits based on the referenced regional metadata.

Strengths

• Contains 43,683 sources, providing a substantial sample for analysis.
• Represents a final unified catalog constructed from multiple individual surveys to eliminate redundancy.
• Includes references to detailed methodology published in peer-reviewed journals like MNRAS and A&AS.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is known, but specific column definitions and data types are not provided in the metadata.
• Last updated 2026 03 13 18:25:19.755154; freshness should be verified for current research needs.

Provenance

Source

NASA HEASARC, based on CDS table J/MNRAS/382/1639.

Collection Method

Constructed by amalgamating existing catalogs from individual fields imaged at 151 MHz with a spatial resolution of 70 x 70cosec(Dec) arcsec².

Time Range

Survey data collected and published from 1990 to 2001, with the unified catalog created in October 2010.

Freshness

Last updated 2026-03-13 18:25:19.755154.

Geography

Covers regions of the radio sky, including a specific low-declination strip (9h < RA < 16h, 20° < Dec < 35°) and the Galactic Plane.