Left panel: M _torus/ M _☉ as a function of the mass ratio q and of the ratio between the gravitational mass of the binary and the maximum mass for an isolated NS ( M _BNS/ M _max). M _torus has been computed using Equation (2). The dotted lines are the isocontours corresponding to the M _torus values in Table 1. Right panel: plot of M _torus as a function of M _BNS/ M _max for all the equal-mass ( q = 1) simulations reported in Table 2. The horizontal bars give the percentage of the SGRBs in Table 1 that are generated by tori with that range of masses (assuming a total efficiency of 5% as in Table 1). Since the mass of the torus increases for q < 1, each point should be considered as a lower limit on the mass that can be obtained for that EOS and mass of the binary. The different points refer to M _torus computed from simulations of BNS mergers using different EOSs (see Table 2).