Continuum, cyclotron line, and absorption variability in the high-mass X-ray binary Vela X-1 C. M. Diez, V. Grinberg, F. Fürst, E. Sokolova-Lapa, A. Santangelo, J. Wilms, K. Pottschmidt, S. Martínez-Núñez, C. Malacaria and P. Kretschmar A&A, 660 (2022) A19 Published online: 31 March 2022 DOI: 10.1051/0004-6361/202141751