1608.02668
The 2-degree field lensing survey: design and clustering measurements
Blake, et al
Present 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 KiDS survey. 2dFLenS obtained 70,079 redshifts in the range z<0.9 over an area of 731 sq deg, and is designed to extend the datasets 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 LRGs, which enable analyses of g-g 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 sub-sample, allowing direct source classification and photometric-redshift calibration. In this paper, describe the motivation, target selection, spectroscopic observations, and clustering analysis of 2dFLenS. Use power spectrum multipole measurements to fit the z-space distortion parameter of the LRG sample in 2 redshift ranges 0.15<z<0.43 and 0.43<z<0.7 as beta=0.49±0.15 and beta=0.26±0.09, respectively. These values are consistent with those obtained from LRGs in BOSS. 2dFLenS data products will be released via http://2dflens.swin.edu.au.
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