Swift/XRT monitoring of the orbital and superorbital modulations in 4U 1909+07 P. Romano, H. I. Cohen, E. Bozzo, N. Islam, A. Lange, R. H. D. Corbet, J. B. Coley and K. Pottschmidt A&A, 699 (2025) A119 Published online: 02 July 2025 DOI: 10.1051/0004-6361/202554601