QQNM ratio amplitudes at null infinity

The files contain all the computed QQNMs ratio of the second-order strain against its two parent modes for a Schwarzschild spacetime, for all couplings 1 < l < 6 and n < 2. E.g. h_{220x220 -> 44}^{(2)} / (h_{220}^{(1)} * h_{220}^{(1)}), as a function of the parent regular and (conjugate of) mirror mode amplitudes of psi4. Note that it uses the q-convention (see paper arXiv:2503.07432). E.g. AConjPsi4[2, -2, 1]) is is the conjugate of the mirror mode to the regular 220 mode amplitude of Psi4 (not the overtone!). Note that, since they always appear as the ratio of mode amplitudes of Psi4, they are also equal to the ratio of the associated mode amplitdues of the strain, e.g. AConjPsi4[2,-2,1] / APsi4[2,2,0] = Conjugate[hstrain[2,-2,1]] / hstrain[2,2,0] (because APsi4 is proportional, up to a real constant, to omega^2 hstrain and use the property to relate the regular and mirror frequencies).Each file is a list of such contributions, where each element of the list is of the form:{{{s,L,M}, {l1,m1,q1}, {l2,m2,q2}}, amplitude of the QQNM strain ratio at infinity},(s is the spin, and is always -2 here).We remark that the amplitudes for QQNM frequencies near/at the branch cut are not accurate, as we experienced a lot of convergence issues.