Spectroscopy of the X-ray Pulsations from Her X-1 with the Einstein Observatory McCray, R. ; Shull, J. M. ; Boynton, P. ; Deeter, J. ; Holt, S. ; White, N. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1980 Bibcode: 1980BAAS...12..821M