Mass-mass diagrams for Ter5ao (top), Ter5ap (middle), and Ter5aw (bottom). The main panels show M_c as a function of cos i (left) and M_p (right). In the left panels, the regions marked in gray are excluded because they imply a negative pulsar mass. For the panels on the right, the gray regions are constrained by the mass function and sin i < 1. The black contours include 68.3, 95.4 and 99.7% of all probability in the 2-D joint posterior probability distribution functions (pdfs) of each panel. The red lines indicate constraints derived from the nominal values of the total mass derived from the nominal value of $\dot{\omega }$ and the ±1-σ uncertainties of its measurement. The minimum companion masses for Ter5ao and Ter5ap are constrained by $\dot{\omega }$ and the limit of sin i < 1 giving M_c > 0.8 M_⊙ and M_c > 0.278 M_⊙ respectively, this results in M_p < 2.23 M_⊙ and M_p < 1.72 M_⊙ respectively. The blue lines represent the constraints derived from the nominal and ±1-σ limits of the orthometric amplitude of the Shapiro delay, h₃. The orange lines designate the 2 and 3-σ upper limits derived for Ter5ap. The top panels depict the normalised 1-D pdfs for cos i, M_p and, on the side, M_c. The medians of the pdfs are depicted by the solid black lines, the dotted lines indicate successive ±1 and 2-σ equivalent percentiles around the median.