LSD profiles of Stokes I (black solid line – bottom profile), V (red solid line – middle profile), and N parameter (blue solid line – top profile) obtained for CPD −57° 3509 in the Bonn reduction. The error bars of the LSD profiles are shown for both Stokes V and the N parameter. The vertical dotted lines indicate the velocity range adopted for the determination of the detection probability and magnetic field value. All profiles have been rigidly shifted upwards/downwards using arbitrary values and the Stokes V and N profiles have been expanded 15 times.