A spectroscopic event of η Car viewed from different directions: The data and first results O. Stahl, K. Weis, D. J. Bomans, K. Davidson, T. R. Gull and R. M. Humphreys A&A, 435 1 (2005) 303-312 Published online: 25 April 2005 DOI: 10.1051/0004-6361:20042547