New Optical Identifications of X-ray Sources From the HEAO A-3 Scanning Modulation Collimator Patterson, J. ; Roberts, W. ; Schwartz, D. A. ; Remillard, R. ; Morgan, E. ; Bradt, H. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1983 Bibcode: 1983BAAS...15..636P