1. Introduction

2. Observations and Reduction

3. Spectral properties of the photospheres
3.1. Effective temperatures and surface gravities
3.2. Spectrum description and peculiarities

4. Magnetic field analysis
4.1. Calculation of LSD profiles
4.2. Origin of the LSD V signatures
4.4. Magnetic properties
4.5. Possible origins for the lack of Stokes V variability

5. Hα magnetospheric signatures

6. Summary