Orbital and sub-orbital period determination of the candidate high-mass X-ray binary HD 3191 Josep Martí, Pedro L. Luque-Escamilla, Estrella Sánchez-Ayaso and Josep M. Paredes A&A, 651 (2021) A1 Published online: 01 July 2021 DOI: 10.1051/0004-6361/202140545