M–R relations derived by Bassa et al. (2006), and already presented in their Fig. 6, obtained from the following theoretical works: Driebe et al. (1998; magenta; D1998); Panei et al. (2000; black: T_eff = 10 090 K, light grey: T_eff = 8000 and 12 000 K; P2000); Rohrmann et al. (2002; dark yellow; R2002), andSerenelli et al. (2002; cyan; S2002). The diagonal green and vertical red lines mark the surface gravity measured by Bassa et al. (2006) and our measurement of the PSR J1910−5959A companion’s mass, respectively (solid: best values, dashed: 1σ lower and upper limits). The blue parallelogram delimits the region in the M–R space consistent with the measured surface gravity and companion mass.