The clustering of galaxies in the SDSS-III Baryon Oscillation
  Spectroscopic Survey: galaxy clustering measurements in the low redshift
  sample of Data Release 11
  We present the distance measurement to z = 0.32 using the 11th data release
of the Sloan Digital Sky Survey-III Baryon Acoustic Oscillation Survey (BOSS).
We use 313,780 galaxies of the low-redshift (LOWZ) sample over 7,341
square-degrees to compute $D_V = (1264 \pm 25)(r_d/r_{d,fid})$ - a sub 2%
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. (2013a) to constrain cosmological parameters.
