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Figure 6
Figure 6: Constraints on phasing corrections in the ppE framework, as determined from LISA observations of 6 ∼ 10 M ⊙ massive–black-hole inspirals at z = 1 and z = 3. The figure also includes the β bounds derived from pulsar PSR J0737–3039 [492], the solar-system bound on the graviton mass [435], and PN-coefficient bounds derived as described Section 5.2.1. The spike at b = 0 corresponds to the degeneracy between the ppE correction and the initial GW-phase parameter. (Adapted from [134].)