Using the ROSAT catalogues to find counterparts for the second IBIS/ISGRI survey sources J. B. Stephen, L. Bassani, A. Malizia, A. Bazzano, P. Ubertini, A. J. Bird, A. J. Dean, F. Lebrun and R. Walter A&A, 445 3 (2006) 869-873 Published online: 03 January 2006 DOI: 10.1051/0004-6361:20053958