Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/34371
Campo DC | Valore | Lingua |
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dc.contributor.author | Thomson, Alec J. M. | en_US |
dc.contributor.author | McConnell, David | en_US |
dc.contributor.author | Lenc, Emil | en_US |
dc.contributor.author | Galvin, Timothy J. | en_US |
dc.contributor.author | Rudnick, Lawrence | en_US |
dc.contributor.author | Heald, George | en_US |
dc.contributor.author | Hale, Catherine L. | en_US |
dc.contributor.author | Duchesne, Stefan W. | en_US |
dc.contributor.author | Anderson, Craig S. | en_US |
dc.contributor.author | CARRETTI, ETTORE | en_US |
dc.contributor.author | Federrath, Christoph | en_US |
dc.contributor.author | Gaensler, B. M. | en_US |
dc.contributor.author | Harvey-Smith, Lisa | en_US |
dc.contributor.author | Haverkorn, Marijke | en_US |
dc.contributor.author | Hotan, Aidan W. | en_US |
dc.contributor.author | Ki Ma, Yik | en_US |
dc.contributor.author | Murphy, Tara | en_US |
dc.contributor.author | McClure-Griffiths, N. M. | en_US |
dc.contributor.author | Moss, Vanessa A. | en_US |
dc.contributor.author | O’Sullivan, Shane P. | en_US |
dc.contributor.author | Raja, Wasim | en_US |
dc.contributor.author | Seta, Amit | en_US |
dc.contributor.author | Van Eck, Cameron L. | en_US |
dc.contributor.author | West, Jennifer L. | en_US |
dc.contributor.author | Whiting, Matthew T. | en_US |
dc.contributor.author | Wieringa, Mark H. | en_US |
dc.date.accessioned | 2023-09-11T14:38:12Z | - |
dc.date.available | 2023-09-11T14:38:12Z | - |
dc.date.issued | 2023 | en_US |
dc.identifier.issn | 1448-6083 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34371 | - |
dc.description.abstract | The Australian SKA Pathfinder (ASKAP) radio telescope has carried out a survey of the entire Southern Sky at 887.5 MHz. The wide area, high angular resolution, and broad bandwidth provided by the low-band Rapid ASKAP Continuum Survey (RACS-low) allow the production of a next-generation rotation measure (RM) grid across the entire Southern Sky. Here we introduce this project as Spectral and Polarisation in Cutouts of Extragalactic sources from RACS (SPICE-RACS). In our first data release, we image 30 RACS-low fields in Stokes I, Q, U at 25" angular resolution, across 744-1032 MHz with 1 MHz spectral resolution. Using a bespoke, highly parallelised, software pipeline we are able to rapidly process wide-area spectro-polarimetric ASKAP observations. Notably, we use `postage stamp' cutouts to assess the polarisation properties of 105912 radio components detected in total intensity. We find that our Stokes Q and U images have an rms noise of ∼ 80 μJy PSF-1, and our correction for instrumental polarisation leakage allows us to characterise components with ≳ 1% polarisation fraction over most of the field of view. We produce a broadband polarised radio component catalogue that contains 5818 RM measurements over an area of ∼ 1300 deg2 with an average error in RM of 1.6+1.1-1.0 rad m-2, and an average linear polarisation fraction 3.4+3.0-1.6%. We determine this subset of components using the conditions that the polarised signal-to-noise ratio is > 8, the polarisation fraction is above our estimated polarised leakage, and the Stokes I spectrum has a reliable model. Our catalogue provides an areal density of 4±2 RMs deg-2; an increase of ∼ 4 times over the previous state-of-the-art (Taylor, Stil, Sunstrum <xref rid="ref94" ref-type="bibr">2009</xref>, ApJ, 702, 1230). Meaning that, having used just 3% of the RACS-low sky area, we have produced the 3rd largest RM catalogue to date. This catalogue has broad applications for studying astrophysical magnetic fields; notably revealing remarkable structure in the Galactic RM sky. We will explore this Galactic structure in a follow-up paper. We will also apply the techniques described here to produce an all-Southern-sky RM catalogue from RACS observations. Finally, we make our catalogue, spectra, images, and processing pipeline publicly available. | en_US |
dc.language.iso | eng | en_US |
dc.title | The Rapid ASKAP Continuum Survey III: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) first data release | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1017/pasa.2023.38 | en_US |
dc.identifier.url | https://arxiv.org/abs/2307.07207 | en_US |
dc.identifier.url | https://www.cambridge.org/core/journals/publications-of-the-astronomical-society-of-australia/article/rapid-askap-continuum-survey-iii-spectra-and-polarisation-in-cutouts-of-extragalactic-sources-spiceracs-first-data-release/7355C6B8459B29E3F838B6DEF4CFAE3B | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 40 | en_US |
dc.relation.article | e040 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2023PASA...40...40T | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairetype | Article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
crisitem.journal.journalissn | 1448-6083 | - |
crisitem.journal.ance | E211088 | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.orcid | 0000-0002-3973-8403 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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File | Descrizione | Dimensioni | Formato | |
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PASA 2307.07207.pdf | preprint | 7.28 MB | Adobe PDF | Visualizza/apri |
1_the-rapid-askap-continuum-survey-iii-spectra-and-polarisation-in-cutouts-of-extragalactic-sources-spice-racs-first-data-release.pdf | [Administrators only] | 9.72 MB | Adobe PDF | |
2_the-rapid-askap-continuum-survey-iii-spectra-and-polarisation-in-cutouts-of-extragalactic-sources-spice-racs-first-data-release.pdf | [Administrators only] | 9.76 MB | Adobe PDF | |
3_the-rapid-askap-continuum-survey-iii-spectra-and-polarisation-in-cutouts-of-extragalactic-sources-spice-racs-first-data-release.pdf | [Administrators only] | 4.3 MB | Adobe PDF | |
4_the-rapid-askap-continuum-survey-iii-spectra-and-polarisation-in-cutouts-of-extragalactic-sources-spice-racs-first-data-release.pdf | [Administrators only] | 6.44 MB | Adobe PDF |
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