RXTE observations of the 1A 1118–61 in an outburst, and the discovery of a cyclotron line V. Doroshenko, S. Suchy, A. Santangelo, R. Staubert, I. Kreykenbohm, R. Rothschild, K. Pottschmidt and J. Wilms A&A, 515 (2010) L1 Published online: 10 June 2010 DOI: 10.1051/0004-6361/201014858