A very luminous, highly extinguished, very fast nova – V1721 Aquilae R. Hounsell, M. J. Darnley, M. F. Bode, D. J. Harman, L. A. Helton and G. J. Schwarz A&A, 530 (2011) A81 Published online: 13 May 2011 DOI: 10.1051/0004-6361/201016085