Reconstructed brightness and magnetic field maps of V530 Per in 2018. Top-left: logarithmic brightness (normalized to the nonspotted brightness). For the sake of clarity, the Hammer projection was adopted and the gravitydarkening was subtracted. Top-right, bottom-left, and bottom-right: radial, azimuthal, and meridional components of the magnetic field. The color scale illustrates the field strength, in Gauss. Meridional ticks at the bottom of the maps mark the rotational phases of our observations. The portion of the map below −40° of latitude is set to 0, as it is invisible to the observer. A polar view of the same maps can be found in Fig. G.1.