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We present baryon acoustic oscillation (BAO) scale measurements determinedfrom the clustering of 1.2 million massive galaxies with redshifts 0.2 < z <0.75 distributed over 9300 square degrees, as quantified by theirredshift-space correlation function. In order to facilitate these measurements,we define, describe, and motivate the selection function for galaxies in thefinal data release (DR12) of the SDSS III Baryon Oscillation SpectroscopicSurvey (BOSS). This includes the observational footprint, masks for imagequality and Galactic extinction, and weights to account for densityrelationships intrinsic to the imaging and spectroscopic portions of thesurvey. We simulate the observed systematic trends in mock galaxy samples anddemonstrate that they impart no bias on baryon acoustic oscillation (BAO) scalemeasurements and have a minor impact on the recovered statistical uncertainty.We measure transverse and radial BAO distance measurements in 0.2 < z < 0.5,0.5 < z < 0.75, and (overlapping) 0.4 < z < 0.6 redshift bins. In each redshiftbin, we obtain a precision that is 2.7 per cent or better on the radialdistance and 1.6 per cent or better on the transverse distance. The combinationof the redshift bins represents 1.8 per cent precision on the radial distanceand 1.1 per cent precision on the transverse distance. This paper is part of aset that analyses the final galaxy clustering dataset from BOSS. Themeasurements and likelihoods presented here are combined with others in Alam etal. (2016) to produce the final cosmological constraints from BOSS.

monthly notices of the royal astronomical society

The clustering of galaxies in the completed SDSS-III Baryon Oscillation  Spectroscopic Survey: Observational systematics and baryon acoustic  oscillations in the correlation function