High resolution solar magnetometry with the spectrograph of the Pic du Midi Turret Dome J.-M. Malherbe, Th. Roudier, P. Mein, J. Moity and R. Muller A&A, 427 2 (2004) 745-753 Published online: 28 October 2004 DOI: 10.1051/0004-6361:20041244