Discovery of X-ray emission from the protostellar jet L1551 IRS5 (HH 154) F. Favata, C. V. M. Fridlund, G. Micela, S. Sciortino and A. A. Kaas A&A, 386 1 (2002) 204-210 Published online: 15 April 2002 DOI: 10.1051/0004-6361:20011387