Master Radio Catalog: Aggregated Flux Densities from NASA HEASARC

NASA HEASARC's RADIO database is a periodically revised master catalog aggregating radio source flux densities from multiple component tables. The catalog includes averaged flux densities and upper limits, with entries linked to their original detailed observations. This service is updated by NASA HEASARC whenever component tables are modified or added.

Use Cases

• Cross-referencing radio sources with other astronomical catalogs based on aggregated flux density parameters.
• Analyzing average flux density measurements for radio sources across different frequencies.
• Identifying radio observations that represent upper limits rather than detections for sensitivity studies.

Strengths

• Aggregates selected parameters from multiple authoritative HEASARC database tables.
• Entries include a `database_table` parameter to trace data back to original, more detailed sources.
• Periodically updated by NASA HEASARC when component tables are modified.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

National Aeronautics and Space Administration (NASA) HEASARC

Collection Method

Compiled and aggregated from multiple HEASARC database tables containing radio observations.

Freshness

Last updated 2026-03-13 16:56:50.006406; freshness should be verified.