Observability of lensing of gravitational waves from massive black hole binaries with LISA

The gravitational waves emitted by massive black hole binaries in the Laser Interferometer Space Antenna (LISA) band can be lensed. Wave-optics effects lensed signal are crucial when Schwarzschild radius of lens is smaller than wavelength radiation. These frequency-dependent enable us to infer parameters, possibly with a single detection alone. In this work, we assess observability wave-optics LISA performing an information-matrix analysis using analytical solutions for both point-mass and singular isothermal sphere lenses. We use gravitational-waveform models that include merger, ringdown, higher harmonics, aligned spins study how waveform source parameters affect measurement errors parameters. find previous work underestimated detect signals impact lower masses.