X-ray emission from the luminous O-type subdwarf HD 49798 and its compact companionS. Mereghetti, N. La Palombara, A. Tiengo, N. Sartore, P. Esposito, G. L. Israel and L. StellaA&A, 553 (2013) A46DOI: https://doi.org/10.1051/0004-6361/201321271
