$\kappa_{ext}/\kappa_0$, $1\sigma$ uncertainty in $\kappa_{ext}$, $g^{(2)}(\tau=0,\kappa_{ext})$, $1\sigma$ uncertainty in $g^{(2)}(\tau=0,\kappa_{ext})$ 0, 0, 0.434305, 0.047169 0.30328, 0.019895, 1.239989, 0.122051 0.4412, 0.033682, 1.7729, 0.408928 1, 0.33604, 5.730124, 0.841426 2.2304, 0.17158, 7.646274, 1.20709 3.2298, 0.21239, 2.985126, 0.232398 5.1196, 0.41846, 2.076273, 0.232156