Polarimetric observations of comet 67P/Churyumov-Gerasimenko during its 2008–2009 apparition E. Hadamcik, A. K. Sen, A. C. Levasseur-Regourd, R. Gupta and J. Lasue A&A, 517 (2010) A86 Published online: 12 August 2010 DOI: 10.1051/0004-6361/201014167