LSD Stokes I, V and diagnostic N profiles of the primary (left) and the secondary (right), normalized to the continuum of the binary I_c. These profiles have been obtained from the first 2007 November 12 spectrum. The mean error bars are indicated beside each profile. The V and N profiles have been shifted vertically and have been multiplied by a factor of 3 for the primary and 2 for the secondary, for display purpose.