Diagram depicting the double pulsar geometry according to the eclipse light-curve model, adapted from Fig. 1 of Breton et al. (2008). The minimum radial extent of the synchrotron absorbing plasma (the cooling radius) is represented by R_min. Longitude and latitude of the spin axis of pulsar B (Ω_B) is given by the angles φ and θ respectively. The magnetic axis (μ_B) is offset from Ω_B by angle α. In our model we have neglected the deflection of A’s radio signals in the gravitational field of B, which amounts to a change in the impact parameter at B of no more than about 600 km (Kramer et al. 2021a).