Distribution of center weights, for a kernel with a radius reflecting the approximate BAO scale, extracted from the 2pcf, R₀ = 109.9 h⁻¹ Mpc for SDSS DR9 galaxies (solid black line), one of the CMASS mocks (blue dashed line), and one of the CMASS randoms (dot-dashed red line). The shaded regions represent uncertainties across a range of values for Ω_M, which is equal to the uncertainty in the most recent estimate from the Planck Collaboration.