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Giant Metrewave Radio Telescope Lockman Hole 610-MHz Radio Source Catalog 2

Metadata Updated: September 19, 2025

This table contains a source catalog based on further observations of the Lockman Hole field, made with the Giant Metrewave Radio Telescope at 610 MHz with an angular resolution of 6 x 5 arcsec<sup>2</sup>. These complement this group's earlier observations of the central ~ 5 deg<sup>2</sup> of the Lockman Hole (Garn et al. 2008, MNRAS, 387, 1037, the HEASARC Browse table GMRTLHCAT) by covering a further ~ 8 deg<sup>2</sup> area, with an rms noise down to ~ 80 microJansky/beam (µJy/beam). A catalog of 4934 radio sources in both the inner and outer regions of the Lockman Hole is presented in this table. The earlier survey had 12 pointings covering ~ 5 square degrees in the center of the Lockman Hole, and herein a further 26 pointings in the outer parts of the Lockman Hole are added, to cover a total of ~ 14 square degrees. To match the earlier survey, the images were made with a resolution of 6" x 5", at a position angle of +45 degrees. The majority of the new pointings have an rms noise of ~80 µJy/beam before the primary beam correction, but the noise in the west - particularly near the very bright source 3C244.1 - is worse. This table was created by the HEASARC in February 2012 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/BASI/38.103">CDS Catalog J/BASI/38.103</a> file gmrtlh2.cat. This is a service provided by NASA HEASARC .

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date April 9, 2025
Metadata Updated Date September 19, 2025

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date April 9, 2025
Metadata Updated Date September 19, 2025
Publisher High Energy Astrophysics Science Archive Research Center
Maintainer
Identifier ivo://nasa.heasarc/gmrtlhcat2
Data Last Modified 2025-09-10
Category Astrophysics
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 2fb6706e-aa25-4270-a2bb-15a593ef62dc
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://heasarc.gsfc.nasa.gov/W3Browse/all/gmrtlhcat2.html
Program Code 026:000
Source Datajson Identifier True
Source Hash 9306cd804f407ad75901c6b42253758168ac2faeb9d64621c48fd1a030c6a4df
Source Schema Version 1.1

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