X-ray luminosity function of faint point sources in the Milky Way S. Sazonov, M. Revnivtsev, M. Gilfanov, E. Churazov and R. Sunyaev A&A, 450 1 (2006) 117-128 Published online: 03 April 2006 DOI: 10.1051/0004-6361:20054297