ATATS: Allen Telescope Array 690-Degree Radio Source Catalog

4408 radio sources detected at 1.4 GHz across 690 square degrees of sky. The catalog, created by NASA HEASARC in 2010 from a 12-epoch survey, has a 5-sigma sensitivity limit of 20 mJy beam⁻¹ and was designed to verify the ATA's mosaic capabilities and detect bright transients.

Use Cases

• Detecting and analyzing rare, bright radio transients based on multi-epoch survey design.
• Comparing source flux densities and positions with the NVSS legacy survey for calibration validation.
• Placing upper limits on transient rates for sources above 40 mJy flux density.
• Investigating source confusion effects due to differing resolutions between surveys.

Strengths

• Multi-epoch design with 12 visits provides temporal coverage for transient detection.
• Contains 4408 sources to a defined 5-sigma sensitivity limit of 20 mJy beam⁻¹.
• Flux calibration appears accurate, with a median flux density reported as 97% of matched NVSS sources.
• Source positions are measured to better than approximately 20 arcseconds.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The circular beam resolution of 150 arcseconds FWHM is relatively low, which may affect source separation.

Provenance

Source

NASA HEASARC, based on electronic Table 2 from the reference paper obtained from the ApJ website.

Collection Method

Catalog generated from a 12-epoch combined radio image survey using the Allen Telescope Array.

Time Range

Survey epochs not specified; catalog created in September 2010.

Freshness

Last updated 2026-03-13 17:31:27.853172; freshness should be verified.

Geography

Covers 690 square degrees of sky; specific celestial coordinates are not provided.