Background modelling for γ-ray spectroscopy with INTEGRAL/SPI Thomas Siegert, Roland Diehl, Christoph Weinberger, Moritz M. M. Pleintinger, Jochen Greiner and Xiaoling Zhang A&A, 626 (2019) A73 Published online: 14 June 2019 DOI: 10.1051/0004-6361/201834920