Complete spectral energy distribution of the hot, helium-rich white dwarf RX J0503.9–2854 D. Hoyer, T. Rauch, K. Werner, J. W. Kruk and P. Quinet A&A, 598 (2017) A135 Published online: 14 February 2017 DOI: 10.1051/0004-6361/201629869