Example of the three kinds of regions with enhanced surface brightness generated by a star in the r-band image; the vertical spike is shown in green, the halo centered on the star in red, and the ghost aligned in the radial direction concerning the center of the OmegaCAM field in orange. The size of the image is nearly 2750 × 2150 pixels, which corresponds to 7.2' × 9.2'. The blue rule indicates 1 arcmin as a reference.