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

R. Sharp; J. T. Allen; L. M. R. Fogarty; S. M. Croom; L. Cortese; A. W. Green; J. Nielsen; S. N. Richards; N. Scott; E. N. Taylor; L. A. Barnes; A. E. Bauer; M. Birchall; J. Bland-Hawthorn; J. V. Bloom; S. Brough; J. J. Bryant; G. N. Cecil; M. Colless; W. J. Couch; M. J. Drinkwater; S. Driver; C. Foster; M. Goodwin; M. L. P. Gunawardhana; I. -T. Ho; E. J. Hampton; A. M. Hopkins; H. Jones; I. S. Konstantopoulos; J. S. Lawrence; S. K. Leslie; G. F. Lewis; J. Liske; Á. R. López-Sánchez; N. P. F. Lorente; R. McElroy; A. M. Medling; S. Mahajan; J. Mould; Q. Parker; M. B. Pracy; D. Obreschkow; M. S. Owers; A. L. Schaefer; S. M Sweet; A. Thomas; C. Tonini; C. J. Walcher

doi:10.1093/mnras/stu2055

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

R. Sharp, J. T. Allen, L. M. R. Fogarty, S. M. Croom, L. Cortese, A. W. Green, J. Nielsen, S. N. Richards, N. Scott, E. N. Taylor, L. A. Barnes, A. E. Bauer, M. Birchall, J. Bland-Hawthorn, J. V. Bloom, S. Brough, J. J. Bryant, G. N. Cecil, M. Colless, W. J. CouchM. J. Drinkwater, S. Driver, C. Foster, M. Goodwin, M. L. P. Gunawardhana, I. -T. Ho, E. J. Hampton, A. M. Hopkins, H. Jones, I. S. Konstantopoulos, J. S. Lawrence, S. K. Leslie, G. F. Lewis, J. Liske, Á. R. López-Sánchez, N. P. F. Lorente, R. McElroy, A. M. Medling, S. Mahajan, J. Mould, Q. Parker, M. B. Pracy, D. Obreschkow, M. S. Owers, A. L. Schaefer, S. M Sweet, A. Thomas, C. Tonini, C. J. Walcher

School of Physics and Astronomy

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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.

Original language	English
Pages (from-to)	1551-1566
Journal	Monthly Notices of the Royal Astronomical Society
Volume	446
Issue number	2
Early online date	20 Nov 2014
DOIs	https://doi.org/10.1093/mnras/stu2055
Publication status	Published - 11 Jan 2015

Keywords

Instrumentation: spectrographs
Methods: data analysis
Techniques: imaging spectroscopy

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10.1093/mnras/stu2055

Sharp-2014-SAMI_MNRAS-1551
© 2014, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stu2055
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SAMI Galaxy Survey
Bryant, J. J. (Creator), Owers, M. S. (Creator), Robotham, A. S. G. (Creator), Croom, S. M. (Creator), Driver, S. P. (Creator), Drinkwater, M. J. (Creator), Lorente, N. P. F. (Creator), Cortese, L. (Creator), Scott, N. (Creator), Colless, M. (Creator), Schaefer, A. (Creator), Taylor, E. N. (Creator), Konstantopoulos, I. S. (Creator), Allen, J. T. (Creator), Baldry, I. (Creator), Barnes, L. (Creator), Bauer, A. E. (Creator), Bland-Hawthorn, J. (Creator), Bloom, J. V. (Creator), Brooks, A. M. (Creator), Brough, S. (Creator), Cecil, G. (Creator), Couch, W. (Creator), Croton, D. (Creator), Davies, R. (Creator), Ellis, S. (Creator), Fogarty, L. M. R. (Creator), Foster, C. (Creator), Glazebrook, K. (Creator), Goodwin, M. (Creator), Green, A. (Creator), Gunawardhana, M. L. (Creator), Hampton, E. (Creator), Ho, I.-T. (Creator), Hopkins, A. M. (Creator), Kewley, L. (Creator), Lawrence, J. S. (Creator), Leon-Saval, S. G. (Creator), Leslie, S. (Creator), McElroy, R. (Creator), Lewis, G. (Creator), Liske, J. (Creator), Lopez-Sanchez, A. R. (Creator), Mahajan, S. (Creator), Medling, A. M. (Creator), Metcalfe, N. (Creator), Meyer, M. (Creator), Mould, J. (Creator), Obreschkow, D. (Creator), O'Toole, S. (Creator), Pracy, M. (Creator), Richards, S. N. (Creator), Shanks, T. (Creator), Sharp, R. (Creator), Sweet, S. M. (Creator), Thomas, A. D. (Creator), Tonini, C. (Creator) & Walcher, C. J. (Creator), SAMI Survey Team, 1 Mar 2015
https://sami-survey.org/ and one more link, https://datacentral.aao.gov.au/asvo/surveys/sami/ (show fewer)
Dataset

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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., ... 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. https://doi.org/10.1093/mnras/stu2055

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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",

author = "R. Sharp and Allen, {J. T.} and Fogarty, {L. M. R.} and Croom, {S. M.} and L. Cortese and Green, {A. W.} and J. Nielsen and Richards, {S. N.} and N. Scott and Taylor, {E. N.} and Barnes, {L. A.} and Bauer, {A. E.} and M. Birchall and J. Bland-Hawthorn and Bloom, {J. V.} and S. Brough and Bryant, {J. J.} and Cecil, {G. N.} and M. Colless and Couch, {W. J.} and Drinkwater, {M. J.} and S. Driver and C. Foster and M. Goodwin and Gunawardhana, {M. L. P.} and Ho, {I. -T.} and Hampton, {E. J.} and Hopkins, {A. M.} and H. Jones and Konstantopoulos, {I. S.} and Lawrence, {J. S.} and Leslie, {S. K.} and Lewis, {G. F.} and J. Liske and L{\'o}pez-S{\'a}nchez, {{\'A}. R.} and Lorente, {N. P. F.} and R. McElroy and Medling, {A. M.} and S. Mahajan and J. Mould and Q. Parker and Pracy, {M. B.} and D. Obreschkow and Owers, {M. S.} and Schaefer, {A. L.} and Sweet, {S. M} and A. Thomas and C. Tonini and Walcher, {C. J.}",

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month = jan,

day = "11",

doi = "10.1093/mnras/stu2055",

language = "English",

volume = "446",

pages = "1551--1566",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Sharp, R, Allen, JT, Fogarty, LMR, Croom, SM, Cortese, L, Green, AW, Nielsen, J, Richards, SN, Scott, N, Taylor, EN, Barnes, LA, Bauer, AE, Birchall, M, Bland-Hawthorn, J, Bloom, JV, Brough, S, Bryant, JJ, Cecil, GN, Colless, M, Couch, WJ, Drinkwater, MJ, Driver, S, Foster, C, Goodwin, M, Gunawardhana, MLP, Ho, I-T, Hampton, EJ, Hopkins, AM, Jones, H, Konstantopoulos, IS, Lawrence, JS, Leslie, SK, Lewis, GF, Liske, J, López-Sánchez, ÁR, Lorente, NPF, McElroy, R, Medling, AM, Mahajan, S, Mould, J, Parker, Q, Pracy, MB, Obreschkow, D, Owers, MS, Schaefer, AL, Sweet, SM, Thomas, A, Tonini, C & Walcher, CJ 2015, 'The SAMI Galaxy Survey: cubism and covariance, putting round pegs into square holes', Monthly Notices of the Royal Astronomical Society, vol. 446, no. 2, pp. 1551-1566. https://doi.org/10.1093/mnras/stu2055

TY - JOUR

T1 - The SAMI Galaxy Survey

T2 - cubism and covariance, putting round pegs into square holes

AU - Sharp, R.

AU - Allen, J. T.

AU - Fogarty, L. M. R.

AU - Croom, S. M.

AU - Cortese, L.

AU - Green, A. W.

AU - Nielsen, J.

AU - Richards, S. N.

AU - Scott, N.

AU - Taylor, E. N.

AU - Barnes, L. A.

AU - Bauer, A. E.

AU - Birchall, M.

AU - Bland-Hawthorn, J.

AU - Bloom, J. V.

AU - Brough, S.

AU - Bryant, J. J.

AU - Cecil, G. N.

AU - Colless, M.

AU - Couch, W. J.

AU - Drinkwater, M. J.

AU - Driver, S.

AU - Foster, C.

AU - Goodwin, M.

AU - Gunawardhana, M. L. P.

AU - Ho, I. -T.

AU - Hampton, E. J.

AU - Hopkins, A. M.

AU - Jones, H.

AU - Konstantopoulos, I. S.

AU - Lawrence, J. S.

AU - Leslie, S. K.

AU - Lewis, G. F.

AU - Liske, J.

AU - López-Sánchez, Á. R.

AU - Lorente, N. P. F.

AU - McElroy, R.

AU - Medling, A. M.

AU - Mahajan, S.

AU - Mould, J.

AU - Parker, Q.

AU - Pracy, M. B.

AU - Obreschkow, D.

AU - Owers, M. S.

AU - Schaefer, A. L.

AU - Sweet, S. M

AU - Thomas, A.

AU - Tonini, C.

AU - Walcher, C. J.

PY - 2015/1/11

Y1 - 2015/1/11

N2 - 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.

AB - 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.

KW - Instrumentation: spectrographs

KW - Methods: data analysis

KW - Techniques: imaging spectroscopy

U2 - 10.1093/mnras/stu2055

DO - 10.1093/mnras/stu2055

M3 - Article

SN - 0035-8711

VL - 446

SP - 1551

EP - 1566

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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SAMI Galaxy Survey

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