Posterior distributions for Icarus model parameters. Contours on the 2-d conditional distributions are at the 1σ, 2σ and 3σ levels. 1-d marginalised distributions are shown on the diagonal. The final parameter, ϵ, is derived from i, T_irr, d (which enters via the Shklovskii corrections to Ė_int) and the pulsar mass (not shown), which is not constrained by the data, but which we marginalised over as a nuisance parameter.