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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
GMRT observations of the XMM large scale structure survey field
Astronomy and Astrophysics, Volume 471, No. 3, Year 2007
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Description
The low-frequency radio survey of the XMM-Large Scale Structure (XMM-LSS) field aims to study the connection between the extragalactic radio source populations and their environment as traced by X-ray and optical emission. In this paper we present new radio observations of the XMM-LSS field carried out using the Giant Meterwave Radio Telescope at 240 and 610 MHz. These observations complement the observations presented by Cohen at al. (2003, ApJ, 591, 640) and Tasse et al. (2006, A&A, 456, 791) at 74 and 325 MHz with the Very Large Array. At 240 and 610 MHz, we reach noise levels of 2.5 and ∼0.3 mJy/beam, leading to the detection of 466 and 769 sources over 18.0 and 12.7 degree 2 with resolutions of 14.7″ and 6.5″ respectively. Combining these data with the available source lists at 74, 325 (Tasse et al. 2006, A&A, 456, 791) and 1400 MHz (NVSS), we build a multifrequency catalogue containing 1611 radio sources. We check for consistency of the astrometry and flux density estimates. We fit a simple synchrotron radiation model to the flux density measurements of the 318 radio sources being detected in at least 4 bands. While ∼26% of them show signature of spectral ageing, ∼6% show self absorption. © ESO 2007.
Authors & Co-Authors
Tasse, Cyril
Netherlands, Leiden
Universiteit Leiden
R̈ottgering, Huub J.A.R.
Netherlands, Leiden
Universiteit Leiden
Best, Phillip N.
United Kingdom, Edinburgh
Royal Observatory
Pierre, Marguerite M.
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Wilman, Richard J.
United Kingdom, Durham
Durham University
Statistics
Citations: 30
Authors: 5
Affiliations: 5
Identifiers
Doi:
10.1051/0004-6361:20066986
ISSN:
14320746
Research Areas
Cancer
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative