Data

AS103 (ASKAP Pilot Survey for POSSUM): reprocessed cubes with off-axis leakage correction

Commonwealth Scientific and Industrial Research Organisation
Ma, Yik Ki ; Vernstrom, Tessa ; Akahori, Takuya ; Thomson, Alec ; Anderson, Craig ; Sun, Xiaohui ; Taylor, Russ ; Van Eck, Cameron ; Harvey-Smith, Lisa ; Willis, Anthony ; West, Jennifer ; Stil, Jeroen ; Rudnick, Lawrence ; Raja, Wasim ; Purcell, Cormac ; O'Sullivan, Shane ; Mcclure-Griffiths, Naomi ; Leahy, J Patrick ; Landecker, Tom ; Heald, George ; Farnes, Jamie ; Carretti, Ettore ; Brown, Shea ; Gaensler, Bryan ; Vanderwoude, Shannon
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25919/yx7d-x676&rft.title=AS103 (ASKAP Pilot Survey for POSSUM): reprocessed cubes with off-axis leakage correction&rft.identifier=https://doi.org/10.25919/yx7d-x676&rft.publisher=Commonwealth Scientific and Industrial Research Organisation&rft.description=This collection contains post-processed image cubes from the POlarization Sky Survey of the Universe’s Magnetism (POSSUM) Pilot 1 survey. These data products include Stokes IQU cubes and corresponding weight cubes for the 10 Pilot 1 survey ASKAP observations. These data are a combination of 10 separate but contiguous 36-beam observations centered on RA (J2000) 321.815° and Dec (J2000) −54.670°. Each field had an integration time of ten hours and the beams were formed in the closepack36 footprint. The survey was observed at full resolution at the ASKAP mid-band frequency range (1152 – 1439 MHz) and averaged to a 288 MHz bandwidth with 1-MHz channel width. The lower half of the band was discarded due to RFI, leaving only the upper 144 frequency channels (1295 – 1439 MHz). These cubes have been leakage corrected using a source based method that involves stacking the 10 observations beam by beam, and fitting residuals with Zernike polynomials to map intensity as a function of distance from the centre of the beam. The cubes have also been convolved to a common 13”x13” resolution across all channels.\nLineage: 9945, 9962, 9972, 9975, 9983, 9992, 10007, 10040, 10043, 10168&rft.creator=Ma, Yik Ki &rft.creator=Vernstrom, Tessa &rft.creator=Akahori, Takuya &rft.creator=Thomson, Alec &rft.creator=Anderson, Craig &rft.creator=Sun, Xiaohui &rft.creator=Taylor, Russ &rft.creator=Van Eck, Cameron &rft.creator=Harvey-Smith, Lisa &rft.creator=Willis, Anthony &rft.creator=West, Jennifer &rft.creator=Stil, Jeroen &rft.creator=Rudnick, Lawrence &rft.creator=Raja, Wasim &rft.creator=Purcell, Cormac &rft.creator=O'Sullivan, Shane &rft.creator=Mcclure-Griffiths, Naomi &rft.creator=Leahy, J Patrick &rft.creator=Landecker, Tom &rft.creator=Heald, George &rft.creator=Farnes, Jamie &rft.creator=Carretti, Ettore &rft.creator=Brown, Shea &rft.creator=Gaensler, Bryan &rft.creator=Vanderwoude, Shannon &rft.date=2024&rft.edition=v1&rft_rights=Creative Commons Attribution 4.0 International Licence https://creativecommons.org/licenses/by/4.0/&rft_rights=Data is accessible online and may be reused in accordance with licence conditions&rft_rights=All Rights (including copyright) CSIRO 2024.&rft_subject=magnetic fields&rft_subject=Cosmology and extragalactic astronomy&rft_subject=Astronomical sciences&rft_subject=PHYSICAL SCIENCES&rft_subject=Astronomical sciences not elsewhere classified&rft.type=dataset&rft.language=English Access the data
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Brief description

This collection contains post-processed image cubes from the POlarization Sky Survey of the Universe’s Magnetism (POSSUM) Pilot 1 survey. These data products include Stokes IQU cubes and corresponding weight cubes for the 10 Pilot 1 survey ASKAP observations. These data are a combination of 10 separate but contiguous 36-beam observations centered on RA (J2000) 321.815° and Dec (J2000) −54.670°. Each field had an integration time of ten hours and the beams were formed in the closepack36 footprint. The survey was observed at full resolution at the ASKAP mid-band frequency range (1152 – 1439 MHz) and averaged to a 288 MHz bandwidth with 1-MHz channel width. The lower half of the band was discarded due to RFI, leaving only the upper 144 frequency channels (1295 – 1439 MHz). These cubes have been leakage corrected using a source based method that involves stacking the 10 observations beam by beam, and fitting residuals with Zernike polynomials to map intensity as a function of distance from the centre of the beam. The cubes have also been convolved to a common 13”x13” resolution across all channels.
Lineage: 9945, 9962, 9972, 9975, 9983, 9992, 10007, 10040, 10043, 10168

Available: 2024-03-18

Data time period: 2019-09-29 to 2022-09-07

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Astronomical Sciences | Astronomical Sciences Not Elsewhere Classified | Cosmology and Extragalactic Astronomy | Physical Sciences | magnetic fields |

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