The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes
Article
Article Title | The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Sharp, R., Allen, J. T., Fogarty, L. M. R., Croom, S. M., Cortese, L., Green, A. W., Nielsen, J., Richards, S. N., Scott, N., Taylor, E. N., Barnes, L. A., Barnes, A. E., Birchall, M., Bland-Hawthorn, J., Bloom, J. V., Brough, S., Bryant, J. J., Cecil, G. N., Colless, M., Couch, W. J., Drinkwater, M. J., Driver, S., Foster, C., Goodwin, M., Gunawardhana, M. L. P., Ho, I.-T., Hampton, E. J., Hopkins, A. M., Jones, H., Konstantopoulos, I. S., Lawrence, J. S., Leslie, S. K., Lewis, G. F., Liske, J., Lopez-Sanchez, Á. R., Lorente, N. P. F., McElroy, R., Medling, A. M., Mahajan, S., Mould, J., Parker, Q., Pracy, M. B., Obreschkow, D., Owers, M. S., Schaefer, A. L., Sweet, S. M., Thomas, A. D., Tonini, C. and Walcher, C. J. |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 446 (2), pp. 1551-1566 |
Number of Pages | 16 |
Year | 2015 |
Publisher | Oxford University Press |
Place of Publication | France |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stu2055 |
Web Address (URL) | https://academic.oup.com/mnras/article/446/2/1551/2891868 |
Abstract | 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. |
Keywords | instrumentation: spectrographs; methods: data analysis; techniques: imaging spectroscopy |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510102. Astronomical instrumentation |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Australian National University |
ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions, Australia | |
University of Sydney | |
Swinburne University of Technology | |
University of Melbourne | |
Australian Astronomical Observatory, Australia | |
University of North Carolina, United States | |
University of Queensland | |
International Centre for Radio Astronomy Research, Australia | |
Sales and Student Recruitment | |
University of Hawaii, United States | |
Monash University | |
European Southern Observatory (ESO), Germany | |
Macquarie University | |
Leibniz Institute for Astrophysics Potsdam, Germany |
https://research.usq.edu.au/item/z75x7/the-sami-galaxy-survey-cubism-and-covariance-putting-round-pegs-into-square-holes
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