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; 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. D. 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, 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. D. Thomas, C. Tonini, C. J. Walcher

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	446
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stu2055
Publication status	Published - 11 Jan 2015

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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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title = "The SAMI Galaxy Survey: Cubism and covariance, putting round pegs into square holes",

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 R. L{\'o}pez-S{\'a}nchez 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 Thomas, {A. D.} and C. Tonini and Walcher, {C. J.}",

note = "Publisher Copyright: {\textcopyright} 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2015",

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 ",

number = "2",

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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, IT, Hampton, EJ, Hopkins, AM, Jones, H, Konstantopoulos, IS, Lawrence, JS, Leslie, SK, Lewis, GF, Liske, J, López-Sánchez, R, Lorente, NPF, McElroy, R, Medling, AM, Mahajan, S, Mould, J, Parker, Q, Pracy, MB, Obreschkow, D, Owers, MS, Schaefer, AL, Sweet, SM, Thomas, AD, 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, 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. D.

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

UR - http://www.scopus.com/inward/record.url?scp=84919688994&partnerID=8YFLogxK

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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