GMRT xFLS Field: 3,944 610-MHz Radio Sources Catalog

3,944 radio sources detected above a ~5-sigma threshold in the Spitzer extragalactic First Look Survey field. Observations were taken at 610 MHz with the Giant Metrewave Radio Telescope, covering ~4 square degrees with a resolution of 5.8 x 4.7 arcsec. The catalog was created by the HEASARC in February 2012 based on a CDS release corrected for a positional rounding error.

Use Cases

• Cross-matching radio sources with infrared counterparts based on the survey's complement to existing infrared data.
• Analyzing source density and distribution across a ~4 square degree field.
• Studying radio source properties at 610 MHz frequency based on the catalog's detection threshold and noise levels.
• Validating or supplementing other radio surveys of the same region mentioned in the description.

Strengths

• Contains 3,944 cataloged sources, providing a substantial sample for analysis.
• Covers a ~4 square degree area with a resolution of 5.8 x 4.7 arcsec.
• Positions were corrected for a rounding error from a previous release, improving data integrity.

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 16:35:17.924395; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS catalog J/MNRAS/376/1251 provided by co-author Sally Hales (MRAO, Cambridge).

Collection Method

Observations from seven pointings with the Giant Metrewave Radio Telescope, reduced and mosaicked as described in a reference paper.

Time Range

Observations date is not specified; catalog version is from 05-May-2008.

Freshness

Last updated 2026-03-13 16:35:17.924395.

Geography

Covers the Spitzer extragalactic First Look Survey (xFLS) field; specific celestial coordinates are not provided.