The unusual multiwavelength properties of the gamma-ray source PMN J1603−4904 Cornelia Müller, M. Kadler, R. Ojha, M. Böck, F. Krauß, G. B. Taylor, J. Wilms, J. Blanchard, B. Carpenter, T. Dauser et al. (20 more) A&A, 562 (2014) A4 Published online: 30 January 2014 DOI: 10.1051/0004-6361/201322827