Infrared imaging and polarimetric observations of the pulsar wind nebula in SNR G21.5-0.9 A. Zajczyk, Y. A. Gallant, P. Slane, S. P. Reynolds, R. Bandiera, C. Gouiffès, E. Le Floc’h, F. Comerón and L. Koch Miramond A&A, 542 (2012) A12 Published online: 25 May 2012 DOI: 10.1051/0004-6361/201117194