X-rays observations of a super-Chandrasekhar object reveal an ONe and a CO white dwarf merger product embedded in a putative SN Iax remnantLidia M. Oskinova, Vasilii V. Gvaramadze, Götz Gräfener, Norbert Langer and Helge TodtA&A, 644 (2020) L8DOI: https://doi.org/10.1051/0004-6361/202039232