Australia Telescope Dwarf Spheroidal Galaxies 2.1-GHz Radio Source Catalog

Observations of six Local Group dwarf spheroidal galaxies performed with the Australia Telescope Compact Array in July 2011. The catalog includes 1392 radio sources detected at 2.1 GHz, with rms noise levels below 0.05 mJy. The project was allocated 123 hours of observing time by NASA.

Use Cases

• Cross-matching radio sources with optical catalogs based on the provided positions and fluxes.
• Analyzing source number counts at 2 GHz to test AGN population models as described.
• Studying the diffuse emission and plasma content within dwarf spheroidal galaxies.
• Comparing source properties with other radio surveys like FIRST, NVSS, and SUMSS as referenced.

Strengths

• Catalog contains 1392 detected radio sources.
• High sensitivity with rms noise levels below 0.05 mJy for all maps.
• Detailed observing parameters provided, including specific on-source integration times for each galaxy (e.g., 16.5 hours for Carina).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations performed with the Australia Telescope Compact Array (ATCA) at 2100 MHz.

Time Range

Observations performed during July 2011.

Freshness

Last updated 2026-03-13 18:31:07.217146; freshness should be verified.

Geography

Fields centered on six dwarf spheroidal galaxies in the Local Group: Carina, Fornax, Sculptor, Bootes II, Segue 2, and Hercules.