Absorption and scattering by interstellar dust in the silicon K-edge of GX 5-1 S. T. Zeegers, E. Costantini, C. P. de Vries, A. G. G. M. Tielens, H. Chihara, F. de Groot, H. Mutschke, L. B. F. M. Waters and S. Zeidler A&A, 599 (2017) A117 Published online: 09 March 2017 DOI: 10.1051/0004-6361/201628507