Extended Data Fig. 6: Assessing the goodness of the global fit to the CPMG dataset.
From: Ideal refocusing of an optically active spin qubit under strong hyperfine interactions

Weighted residual sum of squares per data point, averaged over all the CPMG data subsets of varied Nπ, as a function of two global fit parameters: β and scaling factor κ. Best global fit is found for β = 0.35 and κ = 1.45.