GMRT XMM-LSS 240-MHz Radio Source Catalog with 571 Entries

NASA HEASARC provides the Giant Metrewave Radio Telescope 240-MHz source catalog for the XMM-Large Scale Structure field. The catalog contains 571 entries, comprising 388 single sources and 183 components of multiple sources, derived from observations reaching a noise level of ~2.5 mJy/beam. This table was created by the HEASARC in February 2012 based on the source catalog J/A+A/471/1105.

Use Cases

• Study the connection between radio sources and their environment based on multi-frequency observations mentioned in the description.
• Analyze spectral properties of radio sources based on the synchrotron radiation model fitting described for 318 sources.
• Investigate source populations and spectral ageing signatures based on the reported ~26% of sources showing such effects.
• Cross-match and validate radio source catalogs based on the described consistency checks for astrometry and flux density.

Strengths

• Contains 571 catalog entries (388 single sources, 183 components) at 240 MHz.
• Part of a larger multi-frequency catalog containing 1611 radio sources.
• Observations reached a specific noise level of ~2.5 mJy/beam and covered 18.0 square degrees.
• Includes spectral analysis for 318 sources detected in at least 4 bands.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the full multi-frequency catalog is not specified in this metadata.
• Data may reflect observational bias inherent to the specific radio telescope and field.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Radio observations from the Giant Metrewave Radio Telescope (GMRT) at 240 MHz.

Time Range

Observations likely conducted prior to the 2012 catalog creation; specific dates not provided.

Freshness

Last updated 2026-03-13 17:27:33.797923; freshness should be verified.

Geography

Centered on the XMM-LSS field at RA (J2000) = 2h24m00s, Dec (J2000) = -4°09'47".