Redshifted Fe Kα line from the unusual γ-ray source PMN J1603–4904 C. Müller, F. Krauß, T. Dauser, A. Kreikenbohm, T. Beuchert, M. Kadler, R. Ojha, J. Wilms, M. Böck, B. Carpenter et al. (6 more) A&A, 574 (2015) A117 Published online: 04 February 2015 DOI: 10.1051/0004-6361/201425442