Atomic oxygen abundance toward Sagittarius B2 Dariusz C. Lis, Paul F. Goldsmith, Rolf Güsten, Peter Schilke, Helmut Wiesemeyer, Youngmin Seo and Michael W. Werner A&A, 669 (2023) L15 Published online: 18 January 2023 DOI: 10.1051/0004-6361/202245481