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ATLAS 1.4GHz data release 2 - I. Observations of the CDF-S and ELAIS-S1 fields and methods for constructing differential number counts

Lookup NU author(s): Dr Christopher Hales

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This is the final published version of an article that has been published in its final definitive form by Oxford University Press, 2014.

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Abstract

This is the first of two papers describing the second data release (DR2) of the Australia Telescope Large Area Survey at 1.4 GHz, which comprises deep wide-field observations in total intensity, linear polarization, and circular polarization over the Chandra Deep Field-South and European Large Area Infrared Space Observatory Survey-South 1 regions. DR2 improves upon the first data release by maintaining consistent data reductions across the two regions, including polarization analysis, and including differential number counts in total intensity and linear polarization. Typical DR2 sensitivities across the mosaickedmultipointing images are 30 μJy beam-1 at approximately 12 arcsec × 6 arcsec resolution over a combined area of 6.4 deg2. In this paper we present detailed descriptions of our data reduction and analysis procedures, including corrections for instrumental effects such as positional variations in image sensitivity, bandwidth smearing with a non-circular beam, and polarization leakage, and application of the BLOBCAT source extractor. We present the DR2 images and catalogues of components (discrete regions of radio emission) and sources (groups of physically associated radio components). We describe new analytic methods to account for resolution bias and Eddington bias when constructing differential number counts of radio components. © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

Publication metadata

Author(s): Hales CA, Norris RP, Gaensler BM, Middelberg E, Chow KE, Hopkins AM, Huynh MT, Lenc E, Mao MY

Publication type: Article

Publication status: Published

Journal: Monthly Notices of the Royal Astronomical Society

Year: 2014

Volume: 441

Issue: 3

Pages: 2555-2592

Online publication date: 20/05/2013

Acceptance date: 19/03/2014

Date deposited: 30/06/2017

ISSN (print): 0035-8711

ISSN (electronic): 1365-2966

Publisher: Oxford University Press

URL: https://doi.org/10.1093/mnras/stu576

DOI: 10.1093/mnras/stu576

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