Observations of CN and dust activity of comet 9P/Tempel 1 around Deep ImpactH. Rauer, M. Weiler, C. Sterken, E. Jehin, J. Knollenberg and O. HainautA&A, 459 1 (2006) 257-263DOI: https://doi.org/10.1051/0004-6361:20065512