Constraints on M_c, M_p, and cos i derived from the measurement of Shapiro delay. Coloured dashed lines depict the 1σ uncertainty on the measurement. Black contours show the likelihood or 2D PDFs at 39% (inner) and 85% (outer) confidence ellipse from the maps on (cos i − M_c) and (M_p − M_c) grids derived from the ELL1 binary model fit. The corner plots represent the marginalised 1D PDFs of each of these measurements and the vertical lines on these mark the median, 1σ, and 2σ estimates. The black crosses indicate the best masses fit by the DDGR solution (a theory-dependent variation of the DD binary model; Taylor 1987; Taylor & Weisberg 1989 which assumes GR) and the best inclination derived from the mass function using those masses.