Stability of the HD 73344 system as a function of the semimajor axis and eccentricity of planet c. The cross shows the best-fit values and their 1-σ uncertainty interval. The colour scale is chosen so that dark blue denotes stable orbits and red is highly unstable. The inclination chosen for planet c is labelled; its corresponding mass is M_c = 0.36 M_J for panel a and M_c = 2.05 M_J for panel b.