The XXL Survey XVIII. ATCA 2.1 GHz radio source catalogue and source counts for the XXL-South field
Journal article, 2018
The 2.1 GHz radio source catalogue of the 25 deg(2) ultimate XMM extragalactic survey south (XXL-S) field, observed with the Australia Telescope Compact Array (ATCA), is presented. The final radio mosaic achieved a resolution of similar to 4.8" and a median rms noise of sigma approximate to 41 mu Jy/beam. To date, this is the largest area radio survey to reach this flux density level. A total of 6350 radio components above 5 sigma are included in the component catalogue, 26.4% of which are resolved. Of these components, 111 were merged together to create 48 multiple-component radio sources, resulting in a total of 6287 radio sources in the source catalogue, 25.9% of which were resolved. A survival analysis revealed that the median spectral index of the Sydney University Molonglo Sky Survey (SUMSS) 843 MHz sources in the field is alpha = 0.75, consistent with the values of -0.7 to -0.8 commonly used to characterise radio spectral energy distributions of active galactic nuclei. The 2.1 GHz and 1.4 GHz di ff erential radio source counts are presented and compared to other 1.4 GHz radio surveys. The XXL-S source counts show good agreement with the other surveys.
galaxies: evolution
surveys
catalogs
radio continuum: galaxies
galaxies: general
galaxies: active
Author
Andrew Butler
University of Western Australia
Minh Huynh
University of Western Australia
CSIRO Astronomy and Space Science
Jacinta Delhaize
University of Zagreb
Vernesa Smolcic
University of Zagreb
Anna Kapinska
University of Western Australia
Dinko Milakovic
University of Zagreb
Mladen Novak
University of Zagreb
Nikola Baran
University of Zagreb
Andrew O'Brien
Western Sydney University
Lucio Chiappetti
IASF Milano
Shantanu Desai
IIT Hyderabad
Sotiria Fotopoulou
University of Geneva
Cathy Horellou
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Extragalactic Astrophysics
Chris Lidman
Australian Astronomical Observatory
Marguerite Pierre
University Paris-Saclay
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 620 A3Subject Categories
Accelerator Physics and Instrumentation
Astronomy, Astrophysics and Cosmology
Signal Processing
DOI
10.1051/0004-6361/201630129