HST and spectroscopic observations of the L1551 IRS5 jets (HH154) C. V. M. Fridlund, R. Liseau, A. A. Djupvik, M. Huldtgren, G. J. White, F. Favata and G. Giardino A&A, 436 3 (2005) 983-997 Published online: 03 June 2005 DOI: 10.1051/0004-6361:20042399