The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes

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., Bauer, 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, A. 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. (2015) The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes. Monthly Notices of the Royal Astronomical Society, 446 2: 1551-1566. doi:10.1093/mnras/stu2055

Author 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.
Bauer, 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, A. 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.
Walcher, C. J.
Title The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
Publication date 2015-01-11
Year available 2014
Sub-type Article (original research)
DOI 10.1093/mnras/stu2055
Open Access Status DOI
Volume 446
Issue 2
Start page 1551
End page 1566
Total pages 16
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Language eng
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.
Keyword Instrumentation: spectrographs
Methods: data analysis
Techniques: imaging spectroscopy
Multiobject spectroscopy
Redshift survey
Data release
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID CE1100010200
ARC FS110200023
Institutional Status UQ
Additional Notes Published online ahead of print 21 Nov 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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