Extractable rotational energy of the neutron star at the mass-shedding limit, ﹩{M}_{{\rm{ext}}}^{{\rm{kep}}}﹩, as a function of baryonic mass. The blue and gray curves correspond to the GP and ndu models, respectively. Expected values for J0514–4002A (A. Ridolfi et al. 2019), B1913+16 (J. M. Weisberg et al. 2010), and GW170817 (B. P. Abbott et al. 2019a) are presented.