Magnetic fields in barred galaxies - IV. NGC 1097 and NGC 1365 R. Beck, A. Fletcher, A. Shukurov, A. Snodin, D. D. Sokoloff, M. Ehle, D. Moss and V. Shoutenkov A&A, 444 3 (2005) 739-765 Published online: 05 December 2005 DOI: 10.1051/0004-6361:20053556