A Deep VLA survey at 20cm of the ISO ELAIS survey regions

Abstract

We have used the Very Large Array(VLA) in C configuration to carry out a sensitive 20cm radio survey of regions of sky that have been surveyed in the Far Infra-Red over the wavelength range 5-200 microns with ISO as part of the European Large Area ISO Survey(ELAIS). As usual in surveys based on a relatively small number of overlapping VLA pointings the flux limit varies over the area surveyed. The survey has a flux limit that varies from a 5$\sigma$ limit of 0.135mJy over an area of 0.12deg${}^2$ to a 5$\sigma$ limit of 1.15mJy or better over the whole region covered of 4.22 deg${}^2$. In this paper we present the radio catalogue of 867 sources. These regions of sky have previously been surveyed to shallow flux limits at 20cm with the VLA as part of the VLA D configuration NVSS(FWHM=45 arcsec) and VLA B configuration FIRST(FWHM=5 arcsec) surveys. We have carried out a a detailed comparison of the reliability of our own survey and these two independent surveys in order to assess the reliability and completeness of each survey.

19 pages, 24 figures, submitted to MNRAS, also available in http://www.ast.cam.ac.uk/~ciliegi/elais/papers

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