Data

ASKAP Project AS108 GASKAP-HI Pilot Survey: SMC HI Emission Cube

Commonwealth Scientific and Industrial Research Organisation
Pingel, Nickolas ; Dempsey, James ; Mcclure-Griffiths, Naomi ; Dickey, John ; Jameson, Katherine
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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/www0-4p48&rft.title=ASKAP Project AS108 GASKAP-HI Pilot Survey: SMC HI Emission Cube&rft.identifier=10.25919/www0-4p48&rft.publisher=Commonwealth Scientific and Industrial Research Organisation (CSIRO)&rft.description=This collection contains a 3901x3471x220 pixel data cube consisting of ASKAP data of the neutral hydrogen (HI) emission in the SMC feathered with regridded Parkes data. This cube covers a LSRK velocity range of 40.0 km/s to 253.9 km/s at a spectral resolution of 0.98 km/s. The rms noise level in a single spectral channel is 1.1 K at an angular resolution of 30’’ with an individual pixel size of 7''. This rms level translates to a 5-sigma HI column density detection limit of 4.4e19 cm^-2 over a 20 km/s line width. These data were produced with a custom imaging pipeline that utilizes the joint deconvolution capabilities of WSClean, a third party software suite designed specifically for wide-field imaging, to ensure emission that extends across the boundaries of the ASKAP primary beams is accurately recovered. A multi-scale CLEAN algorithm was employed with scales ranging from 0, 4, 8, 16, 32, 64, 128, and 256 pixels. Other data products include a map of the primary beam response across the ASKAP field-of-view and an integrated intensity image computed over the velocity range of 235.4 km/s to 60.5 km/s. Please see PAPER PLACEHOLDER for comprehensive details on the calibration, imaging, and properties of these data.10941, 10944&rft.creator=Pingel, Nickolas &rft.creator=Dempsey, James &rft.creator=Mcclure-Griffiths, Naomi &rft.creator=Dickey, John &rft.creator=Jameson, Katherine &rft.date=2021&rft.edition=v1&rft_rights=All Rights (including copyright) CSIRO 2021.&rft_rights=Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/&rft_subject=Small Magellanic Cloud, HI line emission, Dwarf irregular Galaxies, Interstellar medium&rft_subject=Astronomical and Space Sciences not elsewhere classified&rft_subject=PHYSICAL SCIENCES&rft_subject=ASTRONOMICAL AND SPACE SCIENCES&rft_subject=Galactic Astronomy&rft.type=dataset&rft.language=English Access the data

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All Rights (including copyright) CSIRO 2021.

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Brief description

This collection contains a 3901x3471x220 pixel data cube consisting of ASKAP data of the neutral hydrogen (HI) emission in the SMC feathered with regridded Parkes data. This cube covers a LSRK velocity range of 40.0 km/s to 253.9 km/s at a spectral resolution of 0.98 km/s. The rms noise level in a single spectral channel is 1.1 K at an angular resolution of 30’’ with an individual pixel size of 7''. This rms level translates to a 5-sigma HI column density detection limit of 4.4e19 cm^-2 over a 20 km/s line width. These data were produced with a custom imaging pipeline that utilizes the joint deconvolution capabilities of WSClean, a third party software suite designed specifically for wide-field imaging, to ensure emission that extends across the boundaries of the ASKAP primary beams is accurately recovered. A multi-scale CLEAN algorithm was employed with scales ranging from 0, 4, 8, 16, 32, 64, 128, and 256 pixels. Other data products include a map of the primary beam response across the ASKAP field-of-view and an integrated intensity image computed over the velocity range of 235.4 km/s to 60.5 km/s. Please see PAPER PLACEHOLDER for comprehensive details on the calibration, imaging, and properties of these data.

Lineage

10941, 10944

Data time period: 2019-12-22 to 2019-12-23

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