Investigating source confusion in PMN J1603–4904 F. Krauß, M. Kreter, C. Müller, A. Markowitz, M. Böck, T. Burnett, T. Dauser, M. Kadler, A. Kreikenbohm, R. Ojha and J. Wilms A&A, 610 (2018) L8 Published online: 20 February 2018 DOI: 10.1051/0004-6361/201732338