The XXL Survey: XXIX. GMRT 610 MHz continuum observations
Journal article, 2018
We present the 25 square-degree GMRT-XXL-N 610 MHz radio continuum survey, conducted at 50 cm wavelength with the Giant Metrewave Radio Telescope (GMRT) towards the XXL Northern field (XXL-N). We combined previously published observations of the XMM-Large Scale Structure (XMM-LSS) field, located in the central part of XXL-N, with newly conducted observations towards the remaining XXL-N area, and imaged the combined data-set using the Source Peeling and Atmospheric Modeling (SPAM) pipeline. The final mosaic encompasses a total area of 30:4 square degrees, with rms <150 μJy beam-1 over 60% of the area. The rms achieved in the inner 9.6 square degree area, enclosing the XMM-LSS field, is about 200 μJy beam-1, while that over the outer 12.66 square degree area (which excludes the noisy edges) is about 45 μJy beam-1. The resolution of the final mosaic is 6.5 arcsec. We present a catalogue of 5434 sources detected at ≥7 × rms. We verify, and correct the reliability of, the catalog in terms of astrometry, flux, and false detection rate. Making use of the (to date) deepest radio continuum survey over a relatively large (2 square degree) field, complete at the flux levels probed by the GMRT-XXL-N survey, we also assess the survey's incompleteness as a function of flux density. The radio continuum sensitivity reached over a large field with a wealth of multi-wavelength data available makes the GMRTXXL- N 610 MHz survey an important asset for studying the physical properties, environments and cosmic evolution of radio sources, in particular radio-selected active galactic nuclei (AGN).
Catalogs
Surveys
Galaxies: active
Author
V. Smolcic
University of Zagreb
H. T. Intema
Leiden University
Bruno Šlaus
University of Zagreb
S. Raychaudhury
University of Birmingham
Inter-University Centre for Astronomy and Astrophysics
M. Novak
University of Zagreb
Cathy Horellou
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
L. Chiappetti
Istituto nazionale di astrofisica (INAF)
J. Delhaize
University of Zagreb
M. Birkinshaw
University of Bristol
M. Bondi
Istituto di Radioastronomia
M. Bremer
University of Bristol
Paolo Ciliegi
Osservatorio Astronomico Di Bologna
C. Ferrari
Observatoire de la Cote d'Azur
K. Kolokythas
Inter-University Centre for Astronomy and Astrophysics
C. Lidman
Australian Astronomical Observatory
Sean L. McGee
Inter-University Centre for Astronomy and Astrophysics
R. P. Norris
Western Sydney University
Commonwealth Scientific and Industrial Research Organisation (CSIRO)
M. Pierre
University Paris-Saclay
H. Rottgering
Leiden University
C. Tasse
Paris Diderot University
W. L. Williams
University of Hertfordshire
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 620 A14Subject Categories
Astronomy, Astrophysics and Cosmology
Geophysics
Physical Geography
DOI
10.1051/0004-6361/201732336