Relativistic magnification in Sgr A*’s light curve. The left graph shows the magnification kernel computed from a library of ray-traced images GRAVITY Collaboration (2020b) for two different inclination angles, as is indicated by the line colors. The time interval plotted is two orbits. Both lensing and boosting peak at the orbit phase near 1.5π (Hamaus et al. 2009). The right graph shows SF_μ3(τ) computed for each magnification curve using Equation (13).