β Ceti in the period June 2010–December 2010. Left panel: normalized Stokes V profiles – observed profiles (black lines); synthetic profiles (red lines); zero level (dashed lines). All profiles are shifted vertically for display purposes. The rotational phases of observations are indicated in the right part of the plot and the error bars are on the left of each profile. Right panel: Magnetic map of β Ceti. The three panels illustrate the field components in spherical coordinates (from top to bottom – radial, azimuthal, meridional). The magnetic field strength is expressed in Gauss. The vertical ticks on top of the radial map show the phases of observations.