Likelihood contours from C. Badenes & D. Maoz (2012), D. Maoz & N. Hallakoun (2017), and this work (for hot WDs). All the contours are transformed to a common parameter space of binaries with separation less than 4 au, as described in D. Maoz et al. (2018). The results of C. Badenes & D. Maoz (2012) after transformation to <4 au space visually disagree with those presented in D. Maoz et al. (2018). The choice of smoothing and how to discard points that get transformed to f_bin > 1 values can significantly alter the contours. Here we perform 1σ smoothing of the contours before the transformation and then project the transformed contours onto a dense grid with f_bin < 1.