Multiwavelength observation of 1A 0535+262=HD 245770 from 2010 to 2021 Wei Liu, Jingzhi Yan, Guangcheng Xiao, Xiukun Li, Bo Gao and Qingzhong Liu A&A, 681 (2024) A10 Published online: 22 December 2023 DOI: 10.1051/0004-6361/202347622