
\begin{thebibliography} {}
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\bibitem{Ballard84}
{Ballard}, B.~W.
\newblock 1984, J. FORTH Appl.\ Res., 4, 33

\bibitem{Blair91cygloop}
{Blair}, W.~P., {Long}, K.~S., {Vancura}, O., {Bowers}, C.~W., {Davidsen},
  A.~F., {Dixon}, W.~V.~D., {Durrance}, S.~T., {Feldman}, P.~D., {Ferguson},
  H.~C., {Henry}, R.~C., {Kimble}, R.~A., {Kriss}, G.~A., {Kruk}, J.~W.,
  {Moos}, H.~W., \& {Gull}, T.~R.
\newblock 1991, \apjlett, 379, L33

\bibitem{Boggess78}
{Boggess}, A. et~al.
\newblock 1978, Nature, 275, 372

\bibitem{B77}
{Broadfoot}, A.~L., {Sandel}, B.~R., {Shemansky}, D.~E., {Atreya}, S.~K.,
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  {Goody}, R., {McElroy}, M.~B., \& {Yung}, Y.~L.
\newblock 1977, Space Sci.\ Rev., 21, 183

\bibitem{BMF79}
{Brune}, W.~H., {Mount}, G.~H., \& {Feldman}, P.~D.
\newblock 1979, \apj, 227, 884

\bibitem{CHO81}
{Carruthers}, G.~R., {Heckathorn}, H.~M., \& {Opal}, C.~B.
\newblock 1981, \apj, 243, 855

\bibitem{CCS89}
{Cook}, T.~A., {Cash}, W., \& {Snow}, T.~P.
\newblock 1989, \apjlett, 347, L81

\bibitem{DFFHF81p375}
{Davidsen}, A.~F., {Fastie}, W.~G., {Feldman}, P.~D., {Hartig}, G.~F., \&
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\newblock 1981, (Proc.\ SPIE 265) Shuttle Pointing of Electro-Optical
  Experiments, p. 375

\bibitem{DFFHM78}
{Davidsen}, A.~F., {Fastie}, W.~G., {Feldman}, P.~D., {Henry}, R.~C., \&
  {Moos}, H.~W.
\newblock 1978, Proposal to NASA, unpublished

\bibitem{DavidsenFountain85}
{Davidsen}, A.~F. \& {Fountain}, G.~H.
\newblock 1985, Johns Hopkins APL Tech.\ Dig., 6, 28

\bibitem{DKDBL91p427}
{Davidsen}, A.~F., {Kimble}, R.~A., {Durrance}, S.~T., {Bowers}, C.~W., \&
  {Long}, K.~S.
\newblock 1991, in Extreme Ultraviolet Astronomy, ed. R.~{Malina} \&
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\bibitem{Davidsen91Nature}
{Davidsen}, A.~F., {Kriss}, G.~A., {Ferguson}, H.~C., {Blair}, W.P., {Bowers},
  C.~W., {Dixon}, W.~V.~D., {Durrance}, S.~T., {Feldman}, P.~D., {Henry},
  R.~C., {Kimble}, R.~A., {Kruk}, J.~W., {Long}, K.~S., {Moos}, H.~W., \&
  {Vancura}, O.
\newblock 1991, Nature, 351, 128

\bibitem{FDBBDDFHKKKLMVG91}
{Feldman}, P.~D., {Davidsen}, A.~F., {Blair}, W.~P., {Bowers}, C.~W., {Dixon},
  W.~V.~D., {Durrance}, S.~T., {Ferguson}, H.~C., {Henry}, R.~C., {Kimble},
  R.~A., {Kriss}, G.~A., {Kruk}, J.~W., {Long}, K.~S., {Moos}, H.~W.,
  {Vancura}, O., \& {Gull}, T.~R.
\newblock 1991, \apjlett, 379, L37

\bibitem{Ferguson91pL69}
{Ferguson}, H.~C., {Davidsen}, A.~F., {Kriss}, G.~A., {Blair}, W.~P., {Bowers},
  C.~W., {Dixon}, W.~V.~D., {Durrance}, S.~T., {Feldman}, P.~D., {Henry},
  R.~C., {Kruk}, J.~W., {Moos}, H.~W., {Vancura}, O., {Long}, K.~S., \&
  {Kimble}, R.~A.
\newblock 1991, \apjlett, 382, L69

\bibitem{H90p49}
{Holberg}, J.~B.
\newblock 1990, in Observatories in Earth Orbit and Beyond, ed. Y.~{Kondo}
  (Dordrecht: Kluwer), ~49

\bibitem{H91p8}
{Holberg}, J.~B.
\newblock 1991, in Extreme Ultraviolet Astronomy, ed. R.~{Malina} \&
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\bibitem{HACP91}
{Holberg}, J.~B., {Ali}, B., {Carone}, T.~E., \& {Polidan}, R.~S.
\newblock 1991, \apj, 375, 716

\bibitem{Kimble92g191b2b}
{Kimble}, R.~A., {Davidsen}, A.~F., {Blair}, W.~P., {Bowers}, C.~W., {Dixon},
  W.~V.~D., {Durrance}, S.~T., {Feldman}, P.~D., {Ferguson}, H.~C., {Henry,},
  R.~C., {Kriss}, G.~A., {Kruk}, J.~W., {Long}, K.~S., {Moos}, H.~W., \&
  {Vancura}, O.
\newblock 1993, \apj, 404, 663

\bibitem{Kriss92ngc4151}
{Kriss}, G.~A., {Davidsen}, A.~F., {Blair}, W.~P., {Bowers}, C.~W., {Dixon},
  W.~V.~D., {Durrance}, S.~T., {Feldman}, P.~D., {Ferguson}, H.~C., {Henry},
  R.~C., {Kimble}, R.~A., {Kruk}, J.~W., {Long}, K.~S., {Moos}, H.~W., \&
  {Vancura}, O.
\newblock 1992a, \apj, 392, 485

\bibitem{Long91pL25}
{Long}, K.~S., {Blair}, W.~P., {Davidsen}, A.~F., {Bowers}, C.~W., {Dixon},
  W.~V.~D., {Durrance}, S.~T., {Feldman}, P.~D., {Henry}, R.~C., {Kriss},
  G.~A., {Kruk}, J.~W., {Moos}, H.~W., {Vancura}, O., {Ferguson}, H.~C., \&
  {Kimble}, R.~A.
\newblock 1991, \apjlett, 381, L25

\bibitem{LBTD85}
{Long}, K.~S., {Bowers}, C.~W., {Tennyson}, P.~P., \& {Davidsen}, A.~F.
\newblock 1985, Adv.\ Electron.\ Electron Phys., 64A, 239

\bibitem{MFDBBDDFHKKKLV91}
{Moos}, H.~W., {Feldman}, P.~D., {Durrance}, S.~T., {Blair}, W.~P., {Bowers},
  C.~W., {Davidsen}, A.~F., {Dixon}, W.~V.~D., {Ferguson}, H.~C., {Henry},
  R.~C., {Kimble}, R.~A., {Kriss}, G.~A., {Kruk}, J.~W., {Long}, K.~S., \&
  {Vancura}, O.
\newblock 1991, \apjlett, 382, L105

\bibitem{R73}
{Rogerson}, J.~B., {Spitzer}, L., {Drake}, J.~F., {Dressler}, K., {Jenkins},
  E.~B., {Morton}, D.~C., \& {York}, D.~G.
\newblock 1973, \apjlett, 181, L97

\bibitem{S90}
{Sciama}, D.~W.
\newblock 1990, \apj, 364, 549

\bibitem{Sciama91pL39}
{Sciama}, D.~W.
\newblock 1991, \apjlett, 367, L39

\bibitem{SJ75}
{Spitzer}, L. \& {Jenkins}, D.~B.
\newblock 1975, ARA\&A, 13, 133

\bibitem{WFB85}
{Woods}, T.~N., {Feldman}, P.~D., \& {Bruner}, G.~H.
\newblock 1985, \apj, 292, 676

\end{thebibliography}
