An interpretation of the phase background based on observed plasma jets P. F. Moretti, A. Cacciani, A. Hanslmeier, M. Messerotti, W. Otruba, W. Pötzi and A. Warmuth A&A, 395 1 (2002) 293-296 Published online: 29 October 2002 DOI: 10.1051/0004-6361:20021355