Small Magellanic Cloud ATCA Radio Continuum Source Classifications

717 radio-continuum sources from the Australia Telescope Compact Array are classified into supernova remnants, HII regions, and background objects. The catalog identifies 71 HII region candidates, 21 supernova remnant candidates, and 616 background sources. NASA HEASARC created this table in March 2005 based on published astronomical research.

Use Cases

• Training classification models to identify astronomical object types based on radio-continuum emission features.
• Statistical analysis of source populations (e.g., supernova remnants vs. HII regions) within the Small Magellanic Cloud.
• Cross-matching radio sources with catalogs in other wavelengths (e.g., X-ray) to study multi-wavelength counterparts.
• Studying the distribution and properties of background radio galaxies as seen through a nearby galaxy.

Strengths

• Contains 717 classified sources, providing a substantial sample for analysis.
• Offers clear categorization into three primary groups (SNRs, HII regions, background sources).
• Includes specific counts for rarer object types, such as 2 candidate planetary nebulae and 1 X-ray binary.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 17:03:48.565242; freshness should be verified.

Provenance

Source

NASA HEASARC, based on data from the Australia Telescope Compact Array (ATCA) and the CDS astronomical database.

Collection Method

Observational data from the ATCA telescope, processed and classified by astronomers, as presented in a published paper (J/MNRAS/355/44).

Freshness

Data table created in March 2005; last metadata update recorded as 2026-03-13.

Geography

Small Magellanic Cloud, a dwarf galaxy near the Milky Way.