Simultaneous ASCA and ROSAT Observations of NGC 5548 Fabian, A. C. ; Nandra, K. ; Brandt, W. N. ; Hayashida, K. ; Makino, F. ; Yamauchi, M. Abstract Publication: New Horizon of X-Ray Astronomy. First Results from ASCA Pub Date: January 1994 Bibcode: 1994nhxr.conf..573F