Integrated polarization image of the GC showing how the angle of polarization would constrain the position of the illuminating source. The polarized flux is shown, color-coded and with arbitrary units. The field of view (FoV) of our test case IXPE is indicated with a white box, and a yellow star indicates the position of Sgr A^∗. Colored segments (Sgr B2: white; Sgr B1: magenta; Sgr C3: cyan; Sgr C2: green; Sgr C1: pink) are representative of the estimated polarization position angle (dashed line) and its associated error (solid line).