The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes
We present a methodology for the regularization and combination of sparse sampled and irregularly gridded observations from fibre-optic multiobject integral field spectroscopy. The approach minimizes interpolation and retains image resolution on combining subpixel dithered data. We discuss the metho...
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Oxford University press. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/
2015
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Online Access: | http://hdl.handle.net/10722/211196 |
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ftunivhongkonghu:oai:hub.hku.hk:10722/211196 2023-05-15T18:10:50+02:00 The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes Sharp, R Lewis, GF Leslie, SK Lawrence, JS Konstantopoulos, IS Jones, H Hopkins, AM Hampton, EJ Ho, IT Gunawardhana, MLP Goodwin, M Foster, C Driver, S Drinkwater, MJ Couch, WJ Colless, M Cecil, GN Bryant, JJ Brough, S Bloom, JV Bland-Hawthorn, J Birchall, M Bauer, AE Barnes, LA Taylor, EN Scott, N Richards, SN Nielsen, J Green, AW Cortese, L Croom, SM Fogarty, LMR Allen, JT Walcher, CJ Tonini, C Thomas, AD Sweet, SM Schaefer, AL Owers, MS Obreschkow, D Pracy, MB Parker, QA Mould, J Mahajan, S Medling, AM McElroy, R Lorente, NPF López-Sánchez, ÁR Liske, J 2015 http://hdl.handle.net/10722/211196 eng eng Oxford University press. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/ Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2015, v. 446, p. 1551-1566 1566 0035-8711 1551 http://hdl.handle.net/10722/211196 446 techniques: imaging spectroscopy instrumentation: spectrographs methods: data analysis Article 2015 ftunivhongkonghu 2023-01-14T16:07:05Z We present a methodology for the regularization and combination of sparse sampled and irregularly gridded observations from fibre-optic multiobject integral field spectroscopy. The approach minimizes interpolation and retains image resolution on combining subpixel dithered data. We discuss the methodology in the context of the Sydney-AAO multiobject integral field spectrograph (SAMI) Galaxy Survey underway at the Anglo-Australian Telescope. The SAMI instrument uses 13 fibre bundles to perform high-multiplex integral field spectroscopy across a 1° diameter field of view. The SAMI Galaxy Survey is targeting ˜3000 galaxies drawn from the full range of galaxy environments. We demonstrate the subcritical sampling of the seeing and incomplete fill factor for the integral field bundles results in only a 10 per cent degradation in the final image resolution recovered. We also implement a new methodology for tracking covariance between elements of the resulting data cubes which retains 90 per cent of the covariance information while incurring only a modest increase in the survey data volume. Article in Journal/Newspaper sami University of Hong Kong: HKU Scholars Hub |
institution |
Open Polar |
collection |
University of Hong Kong: HKU Scholars Hub |
op_collection_id |
ftunivhongkonghu |
language |
English |
topic |
techniques: imaging spectroscopy instrumentation: spectrographs methods: data analysis |
spellingShingle |
techniques: imaging spectroscopy instrumentation: spectrographs methods: data analysis Sharp, R Lewis, GF Leslie, SK Lawrence, JS Konstantopoulos, IS Jones, H Hopkins, AM Hampton, EJ Ho, IT Gunawardhana, MLP Goodwin, M Foster, C Driver, S Drinkwater, MJ Couch, WJ Colless, M Cecil, GN Bryant, JJ Brough, S Bloom, JV Bland-Hawthorn, J Birchall, M Bauer, AE Barnes, LA Taylor, EN Scott, N Richards, SN Nielsen, J Green, AW Cortese, L Croom, SM Fogarty, LMR Allen, JT Walcher, CJ Tonini, C Thomas, AD Sweet, SM Schaefer, AL Owers, MS Obreschkow, D Pracy, MB Parker, QA Mould, J Mahajan, S Medling, AM McElroy, R Lorente, NPF López-Sánchez, ÁR Liske, J The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
topic_facet |
techniques: imaging spectroscopy instrumentation: spectrographs methods: data analysis |
description |
We present a methodology for the regularization and combination of sparse sampled and irregularly gridded observations from fibre-optic multiobject integral field spectroscopy. The approach minimizes interpolation and retains image resolution on combining subpixel dithered data. We discuss the methodology in the context of the Sydney-AAO multiobject integral field spectrograph (SAMI) Galaxy Survey underway at the Anglo-Australian Telescope. The SAMI instrument uses 13 fibre bundles to perform high-multiplex integral field spectroscopy across a 1° diameter field of view. The SAMI Galaxy Survey is targeting ˜3000 galaxies drawn from the full range of galaxy environments. We demonstrate the subcritical sampling of the seeing and incomplete fill factor for the integral field bundles results in only a 10 per cent degradation in the final image resolution recovered. We also implement a new methodology for tracking covariance between elements of the resulting data cubes which retains 90 per cent of the covariance information while incurring only a modest increase in the survey data volume. |
format |
Article in Journal/Newspaper |
author |
Sharp, R Lewis, GF Leslie, SK Lawrence, JS Konstantopoulos, IS Jones, H Hopkins, AM Hampton, EJ Ho, IT Gunawardhana, MLP Goodwin, M Foster, C Driver, S Drinkwater, MJ Couch, WJ Colless, M Cecil, GN Bryant, JJ Brough, S Bloom, JV Bland-Hawthorn, J Birchall, M Bauer, AE Barnes, LA Taylor, EN Scott, N Richards, SN Nielsen, J Green, AW Cortese, L Croom, SM Fogarty, LMR Allen, JT Walcher, CJ Tonini, C Thomas, AD Sweet, SM Schaefer, AL Owers, MS Obreschkow, D Pracy, MB Parker, QA Mould, J Mahajan, S Medling, AM McElroy, R Lorente, NPF López-Sánchez, ÁR Liske, J |
author_facet |
Sharp, R Lewis, GF Leslie, SK Lawrence, JS Konstantopoulos, IS Jones, H Hopkins, AM Hampton, EJ Ho, IT Gunawardhana, MLP Goodwin, M Foster, C Driver, S Drinkwater, MJ Couch, WJ Colless, M Cecil, GN Bryant, JJ Brough, S Bloom, JV Bland-Hawthorn, J Birchall, M Bauer, AE Barnes, LA Taylor, EN Scott, N Richards, SN Nielsen, J Green, AW Cortese, L Croom, SM Fogarty, LMR Allen, JT Walcher, CJ Tonini, C Thomas, AD Sweet, SM Schaefer, AL Owers, MS Obreschkow, D Pracy, MB Parker, QA Mould, J Mahajan, S Medling, AM McElroy, R Lorente, NPF López-Sánchez, ÁR Liske, J |
author_sort |
Sharp, R |
title |
The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
title_short |
The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
title_full |
The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
title_fullStr |
The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
title_full_unstemmed |
The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
title_sort |
sami galaxy survey: cubism and covariance, putting round pegs into square holes |
publisher |
Oxford University press. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/ |
publishDate |
2015 |
url |
http://hdl.handle.net/10722/211196 |
genre |
sami |
genre_facet |
sami |
op_relation |
Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2015, v. 446, p. 1551-1566 1566 0035-8711 1551 http://hdl.handle.net/10722/211196 446 |
_version_ |
1766183564056985600 |