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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: galaxy clustering measurements in the low-redshift sample of Data Release 11

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Author(s)

Rita Tojeiro, Ashley J. Ross, Angela Burden, Lado Samushia, Marc Manera, Will J. Percival, Florian Beutler, J. Brinkmann, Joel R. Brownstein, Antonio J. Cuesta, Kyle Dawson, Daniel J. Eisenstein, Shirley Ho, Cullan Howlett, Cameron K. McBride, Francisco Montesano, Matthew D. Olmstead, John K. Parejko, Beth Reid, Ariel G. Sánchez & 5 more David J. Schlegel, Donald P. Schneider, Jeremy L. Tinker, Mariana Vargas Magaña, Martin White

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Abstract

We present the distance measurement to z = 0.32 using the eleventh data release (DR) of the Sloan Digital Sky Survey-III Baryon Acoustic Oscillation Survey (BOSS). We use 313 780 galaxies of the low-redshift (LOWZ) sample over 7341 square degrees to compute DV=(1264 ± 25)(rd/rd,fid}) - a sub 2 per cent measurement - using the baryon acoustic feature measured in the galaxy two-point correlation function and power spectrum. We compare our results to those obtained in DR10. We study observational systematics in the LOWZ sample and quantify potential effects due to photometric offsets between the northern and southern Galactic caps. We find the sample to be robust to all systematic effects found to impact on the targeting of higher redshift BOSS galaxies and that the observed north-south tensions can be explained by either limitations in photometric calibration or by sample variance, and have no impact on our final result. Our measurement,combined with the baryonic acoustic scale at z = 0.57, is used in Anderson et al. to constrain cosmological parameters.

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Original languageEnglish
Pages (from-to)2222-2237
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Volume440
Issue number3
Early online date4 Apr 2014
DOIs
Publication statusPublished - 21 May 2014

    Research areas

  • Surveys, Cosmology: observations, Distance scale, Large-scale structure of Universe

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