Temporal profiles of the longitudinally averaged radial (top) and azimuthal (bottom) large-scale magnetic field of ι Hor. Symbols and colors denote the range of latitudes of extraction, with error bars indicating the standard deviation of each component within the associated latitude strip as well as with longitude. Solid lines (with corresponding colors) show the resulting best-fit solution for a single-period model (three free parameters) at a given latitude bin (see text for details).