White, G. J.; Pearson, C.; Braun, R.; Serjeant, S.; Matsuhara, H.; Takagi, T.; Nakagawa, T.; Shipman, R.; Barthel, P.; Hwang, N.; Lee, H. M.; Lee, M. G.; Im, M.; Wada, T.; Oyabu, S.; Pak, S.; Chun, M.-Y.; Hanami, H.; Goto, T. and Oliver, S.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1051/0004-6361/200913366|
|Google Scholar:||Look up in Google Scholar|
Aims. The Westerbork Radio Synthesis Telescope, WSRT, has been used to make a deep radio survey of an ~1.7 degree2 field coinciding with the AKARI north ecliptic pole deep field. The observations, data reduction and source count analysis are presented, along with a description of the overall scientific objectives.
Methods. The survey consisted of 10 pointings, mosaiced with enough overlap to maintain a similar sensitivity across the central region that reached as low as 21 μJy beam-1 at 1.4 GHz.
Results. A catalogue containing 462 sources detected with a resolution of 17.0″ × 15.5″ is presented. The differential source counts calculated from the WSRT data have been compared with those from the shallow VLA-NEP survey of Kollgaard et al. 1994, and show a pronounced excess for sources fainter than ~1 mJy, consistent with the presence of a population of star forming galaxies at sub-mJy flux levels.
Conclusions. The AKARI north ecliptic pole deep field is the focus of a major observing campaign conducted across the entire spectral region. The combination of these data sets, along with the deep nature of the radio observations will allow unique studies of a large range of topics including the redshift evolution of the luminosity function of radio sources, the clustering environment of radio galaxies, the nature of obscured radio-loud active galactic nuclei, and the radio/far-infrared correlation for distant galaxies. This catalogue provides the basic data set for a future series of paper dealing with source identifications, morphologies, and the associated properties of the identified radio sources.
|Item Type:||Journal Article|
|Copyright Holders:||2010 ESO|
|Extra Information:||23 pp.|
|Keywords:||radio continuum; galaxies; cosmology|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Astrid Peterkin|
|Date Deposited:||08 Dec 2010 09:51|
|Last Modified:||25 Feb 2016 08:40|
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