GMRT H-ATLAS/GAMA: 325-MHz Radio Source Catalog for 90 Square Degrees

A catalog of 5263 radio sources detected at 325 MHz by the Giant Metrewave Radio Telescope (GMRT). The survey covers approximately 90 square degrees of sky across three equatorial fields from the Herschel-ATLAS and GAMA surveys. This table was created by NASA's HEASARC in December 2013 based on source lists from a reference paper.

Use Cases

• Cross-matching radio sources with optical/infrared data based on the survey's overlap with H-ATLAS and GAMA fields.
• Investigating radio spectral indices by comparing 325-MHz flux densities with 1.4-GHz detections.
• Statistical analysis of source populations down to a 5-sigma detection threshold as described in the catalog.
• Studying the low-frequency radio properties of galaxies out to redshift z ~1 as mentioned in the description.

Strengths

• Contains 5263 sources detected above a local 5-sigma threshold.
• Covers a significant area of approximately 90 square degrees of sky.
• Images have a resolution between 14 and 24 arcseconds and a minimum rms noise of ~1 mJy/beam.
• Derived from a standardized pipeline for flagging, calibration, self-calibration, and source detection.

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

Sources were imaged and catalogued from 212 GMRT pointings using an automated pipeline.

Freshness

Last updated 2026-03-13 16:40:24.515544; freshness should be verified.

Geography

Covers three equatorial fields at 9, 12, and 14.5 hours of Right Ascension.