GMRT Lockman Hole 610-MHz Catalog of 2,845 Radio Sources

NASA HEASARC provides a catalog of 2,845 radio sources detected above a 6-sigma threshold from Giant Metrewave Radio Telescope observations. The data covers an area of approximately 5 square degrees in the Lockman Hole region at 610 MHz, with observations taken on July 24-25, 2004. This table was created in February 2012 based on an external catalog from the CDS.

Use Cases

• Calculate radio source counts at 610 MHz based on the cataloged source list.
• Model pure luminosity evolution of local radio luminosity functions for active galactic nuclei and starburst galaxies.
• Combine 610-MHz source counts with existing 1.4-GHz counts for comparative cosmological studies.
• Analyze source distribution and properties within the central region of the Lockman Hole.

Strengths

• Contains 2,845 sources detected above a well-defined 6-sigma threshold.
• Covers a total area of approximately 5 square degrees with a resolution of 6 x 5 arcseconds.
• Majority of pointings have a reported rms noise of ~60 microJansky/beam before primary beam correction.

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 19:55:42.856264; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC), based on CDS Catalog J/MNRAS/387/1037.

Collection Method

Observations from the Giant Metrewave Radio Telescope (GMRT) on 2004 July 24 and 25, with data reduction and mosaicking techniques described in a reference paper.

Time Range

Observations from July 24-25, 2004.

Freshness

Last updated 2026-03-13 19:55:42.856264.

Geography

The Lockman Hole region in space, covering ~5 square degrees.