Curiosity Mars methane measurements are not confused by ozone Christopher R. Webster, Paul R. Mahaffy, Sushil K. Atreya, Gregory J. Flesch, Charles A. Malespin and Ashwin R. Vasavada A&A, 641 (2020) L3 Published online: 01 September 2020 DOI: 10.1051/0004-6361/202038815