STIS optical spectroscopy of the lobes of CRL 618 A. Riera, A. C. Raga, P. F. Velázquez, S. A. R. Haro-Corzo and P. Kajdic A&A, 533 (2011) A118 Published online: 12 September 2011 DOI: 10.1051/0004-6361/201014891