Probability of forming a GW source through stable MT with an 8 M_⊙ donor as a function of the CO accretor mass m_a, i and orbital period P_i. The donor star is assumed to form a NS with an isotropic kick (see Sect. 3.2). Analogous symbols and notation, as in Fig. 5, are employed for the purely isotropic re-emission channel (β = 1). The contour color code maps the probabilities, p_{tmerge <  tH}, of obtaining merging times t_merge <  t_H, given the distribution of kick velocities from Hobbs et al. (2005) and isotropic kick directions, as explained in Sect. 3.2.