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The 2-degree Field Lensing Survey: design and clustering measurements

The 2-degree Field Lensing Survey: design and clustering measurements
The 2-degree Field Lensing Survey: design and clustering measurements
We present the 2-degree Field Lensing Survey (2dFLenS), a new galaxy redshift survey performed at the Anglo-Australian Telescope. 2dFLenS is the first wide-area spectroscopic survey specifically targeting the area mapped by deep-imaging gravitational lensing fields, in this case the Kilo-Degree Survey. 2dFLenS obtained 70?079 redshifts in the range z < 0.9 over an area of 731 deg2, and is designed to extend the data sets available for testing gravitational physics and promote the development of relevant algorithms for joint imaging and spectroscopic analysis. The redshift sample consists first of 40?531 Luminous Red Galaxies (LRGs), which enable analyses of galaxy–galaxy lensing, redshift-space distortion, and the overlapping source redshift distribution by cross-correlation. An additional 28?269 redshifts form a magnitude-limited (r < 19.5) nearly complete subsample, allowing direct source classification and photometric-redshift calibration. In this paper, we describe the motivation, target selection, spectroscopic observations, and clustering analysis of 2dFLenS. We use power spectrum multipole measurements to fit the redshift-space distortion parameter of the LRG sample in two redshift ranges 0.15 < z < 0.43 and 0.43 < z < 0.7 as ? = 0.49 ± 0.15 and ? = 0.26 ± 0.09, respectively. These values are consistent with those obtained from LRGs in the Baryon Oscillation Spectroscopic Survey. 2dFLenS data products will be released via our website http://2dflens.swin.edu.au.
0035-8711
4240-4265
Blake, Chris
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Amon, Alexandra
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Childress, Michael
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Erben, Thomas
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Glazebrook, Karl
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Harnois-Deraps, Joachim
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Heymans, Catherine
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Hildebrandt, Hendrik
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Hinton, Samuel R.
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Janssens, Steven
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Johnson, Andrew
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Joudaki, Shahab
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Klaes, Dominik
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Kuijken, Konrad
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Lidman, Chris
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Marin, Felipe A.
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Parkinson, David
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Poole, Gregory B.
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Wolf, Christian
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Blake, Chris
083029ac-caa7-4790-a58c-c15fe6e107b4
Amon, Alexandra
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Childress, Michael
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Erben, Thomas
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Glazebrook, Karl
a0f7c538-1e8c-4ea8-9f49-a5ab0eb353f4
Harnois-Deraps, Joachim
c128cc70-ab1c-4b38-b635-7f752570add4
Heymans, Catherine
be9f88bf-55af-447b-88f5-2bfa3171fc48
Hildebrandt, Hendrik
88214027-3f17-43ba-9423-71b85c6a355b
Hinton, Samuel R.
9e2f00d6-7026-4491-a28e-17d5880f65d1
Janssens, Steven
94351e08-1c10-41ce-9fbc-f9dc7246ad0c
Johnson, Andrew
fb03647e-4e70-4afb-a6c7-9739a6c7fadd
Joudaki, Shahab
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Klaes, Dominik
ff75cb0a-9135-48ee-95b5-a7662c5b045d
Kuijken, Konrad
cb871c41-2eb0-4f23-97c2-bebd0f7e5e5d
Lidman, Chris
b22c76f7-371b-49b0-92f5-5c656a641b91
Marin, Felipe A.
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Parkinson, David
cb8d2a50-b8ac-42e2-9ed6-a743a8597b71
Poole, Gregory B.
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Wolf, Christian
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Blake, Chris, Amon, Alexandra, Childress, Michael, Erben, Thomas, Glazebrook, Karl, Harnois-Deraps, Joachim, Heymans, Catherine, Hildebrandt, Hendrik, Hinton, Samuel R., Janssens, Steven, Johnson, Andrew, Joudaki, Shahab, Klaes, Dominik, Kuijken, Konrad, Lidman, Chris, Marin, Felipe A., Parkinson, David, Poole, Gregory B. and Wolf, Christian (2016) The 2-degree Field Lensing Survey: design and clustering measurements. Monthly Notices of the Royal Astronomical Society, 462 (4), 4240-4265. (doi:10.1093/mnras/stw1990).

Record type: Article

Abstract

We present the 2-degree Field Lensing Survey (2dFLenS), a new galaxy redshift survey performed at the Anglo-Australian Telescope. 2dFLenS is the first wide-area spectroscopic survey specifically targeting the area mapped by deep-imaging gravitational lensing fields, in this case the Kilo-Degree Survey. 2dFLenS obtained 70?079 redshifts in the range z < 0.9 over an area of 731 deg2, and is designed to extend the data sets available for testing gravitational physics and promote the development of relevant algorithms for joint imaging and spectroscopic analysis. The redshift sample consists first of 40?531 Luminous Red Galaxies (LRGs), which enable analyses of galaxy–galaxy lensing, redshift-space distortion, and the overlapping source redshift distribution by cross-correlation. An additional 28?269 redshifts form a magnitude-limited (r < 19.5) nearly complete subsample, allowing direct source classification and photometric-redshift calibration. In this paper, we describe the motivation, target selection, spectroscopic observations, and clustering analysis of 2dFLenS. We use power spectrum multipole measurements to fit the redshift-space distortion parameter of the LRG sample in two redshift ranges 0.15 < z < 0.43 and 0.43 < z < 0.7 as ? = 0.49 ± 0.15 and ? = 0.26 ± 0.09, respectively. These values are consistent with those obtained from LRGs in the Baryon Oscillation Spectroscopic Survey. 2dFLenS data products will be released via our website http://2dflens.swin.edu.au.

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Accepted/In Press date: 5 August 2016
e-pub ahead of print date: 9 August 2016
Published date: 11 November 2016
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 404047
URI: http://eprints.soton.ac.uk/id/eprint/404047
ISSN: 0035-8711
PURE UUID: 86cb59ea-9e2f-4cf9-8090-3d2508407b86

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Date deposited: 20 Dec 2016 09:26
Last modified: 16 Dec 2019 19:33

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Contributors

Author: Chris Blake
Author: Alexandra Amon
Author: Michael Childress
Author: Thomas Erben
Author: Karl Glazebrook
Author: Joachim Harnois-Deraps
Author: Catherine Heymans
Author: Hendrik Hildebrandt
Author: Samuel R. Hinton
Author: Steven Janssens
Author: Andrew Johnson
Author: Shahab Joudaki
Author: Dominik Klaes
Author: Konrad Kuijken
Author: Chris Lidman
Author: Felipe A. Marin
Author: David Parkinson
Author: Gregory B. Poole
Author: Christian Wolf

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