Theoretical light curves in the free-zone using Eqs. (1), (2) and (A.2). We explore how the light curve changes as we vary the magnetic field (top-left panel), the initial spin period (top-right panel), the magnetar radius (bottom-left panel), and the ellipticity (bottom-right panel). The text in the upper right of each panel shows the fixed parameters in the numerical solutions, while the legends and colored curves indicate the varied parameters and the range in the values.