Detecting the intrinsic X-ray emission from the O-type donor star and the residual accretion in a supergiant fast X-ray transient in its faintest stateL. Sidoli, K. Postnov, L. Oskinova, P. Esposito, A. De Luca, M. Marelli and R. SalvaterraA&A, 654 (2021) A131DOI: https://doi.org/10.1051/0004-6361/202141378
