The structure of atomic gas around the supernova remnant 3C 400.2 E. B. Giacani, G. Dubner, C. Cappa and J. Testori Astron. Astrophys. Suppl. Ser., 133 1 (1998) 61-70 Published online: 15 November 1998 DOI: 10.1051/aas:1998310