V4641Sgr – A super-Eddington source enshrouded by an extended envelope M. Revnivtsev, R. Sunyaev, M. Gilfanov and E. Churazov A&A, 385 3 (2002) 904-908 Published online: 15 April 2002 DOI: 10.1051/0004-6361:20020189