Canizares, C.R. and Bradt, H.V.D. and Clark, G.W. and Joss, P.C. and Levine, A.M. and Lewin, W.H.G. and Markert, T.H. and Mayer, W. and Fabian, A.C. and Woodgate, B.E.
Margon, B. and Canizares, C. and Catura, R.C. and Clark, G.W. and Fichtel, C.E. and Friedman, H. and Giacconi, R. and Grindlay, J.E. and Helfand, D.J. and Holt, S.S.