MENHAG: Modulation ENgine for Harmonic ASAD Generation

MENHAG builds the polarization response of a wide field-of-view Compton polarimeter, the set of azimuthal scattering angle distributions over photon energy and polarization angle, from a small set of simulated inputs: from the unpolarized simulation alone through the analytic modulation kernel of the gated, frame-transformed Klein-Nishina cross-section (mode 1), or from the unpolarized simulation and fully polarized simulations at two polarization angles per energy (mode 2). It is the code behind the paper A Generalized Framework for Rapid Polarization Response Generation in Wide Field-of-View Compton Polarimeters (Zaid et al., The Astrophysical Journal, submitted 2026), released so that anyone can generate responses for their own instrument.