Data

ASKAP Project AS103: Prototype Faraday rotation catalogs from the POSSUM pilot observations

Commonwealth Scientific and Industrial Research Organisation
Vanderwoude, Shannon ; West, Jennifer ; Gaensler, Bryan ; Rudnick, Lawrence ; Van Eck, Cameron ; Thomson, Alec ; Andernach, Heinz ; Anderson, Craig ; Carretti, Ettore ; Heald, George ; Leahy, J Patrick ; Mcclure-Griffiths, Naomi ; O'Sullivan, Shane ; Tahani, Mehrnoosh ; Willis, Anthony
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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:doi10.25919/762j-qh09&rft.title=ASKAP Project AS103: Prototype Faraday rotation catalogs from the POSSUM pilot observations&rft.identifier=https://doi.org/10.25919/762j-qh09&rft.publisher=Commonwealth Scientific and Industrial Research Organisation&rft.description=This collection contains post-processed image and catalog data products analyzed in Vanderwoude et al 2024.\n \nStokes IQU full image cubes:\nPOSSUM pilot I low-band observation SB10635, convolved to 21 arcsecond resolution across all frequency channels (cubes image.restored.*.SB10635.contcube.linmos.21arcsec.fits).\nPOSSUM pilot II low-band observation SB43773, convolved to 16.5 arcsecond resolution across all frequency channels (cubes image.restored.*.SB43773.band1.contcube.16.5arcsec.fits.\n \n \nStokes IQU uniform sensitivity regions:\nThese cubes are cutouts of the full image cubes, that contain the regions of uniform sensitivity in Vanderwoude et al (2024). The cutouts are slightly larger than the define regions to allow for spectrum extaction of components near the edge of the region. These cutouts include the low-band POSSUM pilot I observation SB10635 (cubes SB10635.*.uniform.sens.reg.fits) at 21 arcsecond resolution, the mid-band POSSUM pilot I observation SB10043 at 13 arcsecond resolution (cubes SB10043.*.uniform.sens.reg.13arcsec.fits) and 21 arcsecond resolution (cubes SB10043.i.uniform.sens.reg.21arcsec.fits; these were used to combine the low- and mid-band spectra), and the low-band POSSUM pilot II observation SB43773 at 16.5 arcsecond resolution (cubes SB43773.*.uniform.sens.reg.fits).\n \n \nMulti-frequency synthesis Stokes I images:\nZeroth order multi-frequency Taylor series (Taylor 0) images for three observations: SB10635 (image.i.SB10635.cont.taylor.0.restored.conv.fits), SB10043 (image.i.SB10043.cont.taylor.0.restored.fits), and SB43773 (image.i.SB43773.cont.taylor.0.restored.conv.fits). These images were used to produce the total intensity component catalogues (described below).\n \n \nSelavy total intensity component catalogues:\nTotal intensity component catalogues for three observations: SB10635 (selavy-image.i.SB10635.cont.taylor.0.restored.conv.components.xml), SB10043 (selavy-image.i.SB10043.cont.taylor.0.restored.components.xml), and SB43773 (selavy-image.i.EMU_1554-55_band1.SB43773.cont.taylor.0.restored.conv.components.xml). The Selavy source finder was run on the individual Stokes I Taylor 0 images (described above) to produce the respective component catalogues.\n \n \nRM catalogues:\nFaraday rotation measure (RM) catalogues for three observations (SB10635, SB10043, and SB43773) and a combined observation (SB10635 and SB10043), both with and without a median filter applied. The catalogues are in the RMTable standard format (2023ApJS..267...28V). Median filtered catalogues have medfilt in the name and unfiltered catalogues have nofilt in the name. The combined low- and mid-band pilot I observations have combined in the name.\n\nLineage: 10635, 10043, 43773&rft.creator=Vanderwoude, Shannon &rft.creator=West, Jennifer &rft.creator=Gaensler, Bryan &rft.creator=Rudnick, Lawrence &rft.creator=Van Eck, Cameron &rft.creator=Thomson, Alec &rft.creator=Andernach, Heinz &rft.creator=Anderson, Craig &rft.creator=Carretti, Ettore &rft.creator=Heald, George &rft.creator=Leahy, J Patrick &rft.creator=Mcclure-Griffiths, Naomi &rft.creator=O'Sullivan, Shane &rft.creator=Tahani, Mehrnoosh &rft.creator=Willis, Anthony &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 and catalog data products analyzed in Vanderwoude et al 2024.

Stokes IQU full image cubes:
POSSUM pilot I low-band observation SB10635, convolved to 21 arcsecond resolution across all frequency channels (cubes image.restored.*.SB10635.contcube.linmos.21arcsec.fits).
POSSUM pilot II low-band observation SB43773, convolved to 16.5 arcsecond resolution across all frequency channels (cubes image.restored.*.SB43773.band1.contcube.16.5arcsec.fits.


Stokes IQU uniform sensitivity regions:
These cubes are cutouts of the full image cubes, that contain the regions of uniform sensitivity in Vanderwoude et al (2024). The cutouts are slightly larger than the define regions to allow for spectrum extaction of components near the edge of the region. These cutouts include the low-band POSSUM pilot I observation SB10635 (cubes SB10635.*.uniform.sens.reg.fits) at 21 arcsecond resolution, the mid-band POSSUM pilot I observation SB10043 at 13 arcsecond resolution (cubes SB10043.*.uniform.sens.reg.13arcsec.fits) and 21 arcsecond resolution (cubes SB10043.i.uniform.sens.reg.21arcsec.fits; these were used to combine the low- and mid-band spectra), and the low-band POSSUM pilot II observation SB43773 at 16.5 arcsecond resolution (cubes SB43773.*.uniform.sens.reg.fits).


Multi-frequency synthesis Stokes I images:
Zeroth order multi-frequency Taylor series (Taylor 0) images for three observations: SB10635 (image.i.SB10635.cont.taylor.0.restored.conv.fits), SB10043 (image.i.SB10043.cont.taylor.0.restored.fits), and SB43773 (image.i.SB43773.cont.taylor.0.restored.conv.fits). These images were used to produce the total intensity component catalogues (described below).


Selavy total intensity component catalogues:
Total intensity component catalogues for three observations: SB10635 (selavy-image.i.SB10635.cont.taylor.0.restored.conv.components.xml), SB10043 (selavy-image.i.SB10043.cont.taylor.0.restored.components.xml), and SB43773 (selavy-image.i.EMU_1554-55_band1.SB43773.cont.taylor.0.restored.conv.components.xml). The Selavy source finder was run on the individual Stokes I Taylor 0 images (described above) to produce the respective component catalogues.


RM catalogues:
Faraday rotation measure (RM) catalogues for three observations (SB10635, SB10043, and SB43773) and a combined observation (SB10635 and SB10043), both with and without a median filter applied. The catalogues are in the RMTable standard format (2023ApJS..267...28V). Median filtered catalogues have "medfilt" in the name and unfiltered catalogues have "nofilt" in the name. The combined low- and mid-band pilot I observations have "combined" in the name.

Lineage: 10635, 10043, 43773

Available: 2024-03-15

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

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

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