Observations of CN and dust activity of comet 9P/Tempel 1 around Deep Impact H. Rauer, M. Weiler, C. Sterken, E. Jehin, J. Knollenberg and O. Hainaut A&A, 459 1 (2006) 257-263 Published online: 12 September 2006 DOI: 10.1051/0004-6361:20065512