References

Allen, G. et al. 1997, ApJ, 487, L97

Antonucci, R.R.J. 1993, ARA&A, 31, 473

Antonucci, R.R.J. & Miller, J.S. 1985, ApJ, 297, 621

Aschenbach, B. 1998, Nature, 396, 141

Axford, W.I. 1992, in Particle Acceleration in Cosmic Plasmas; Proceedings of the Workshop, Bartol Research Inst., Newark, DE, Dec 4-6 1991 (A93-39976 16-93), 45

Barber, B. et al. 1997, J. Elec. Met., 26-6, 765

Bowyer, S. et al. 1996, Science, 274, 1338

Boyle, B.J. et al. 1998a, MNRAS, 296, 1

Boyle, B.J. et al. 1998b, MNRAS, 297, L53

Chan, K.-W. & Lingenfelter, R.E. 1991, ApJ, 368, 515

Chen, W. & Gehrels, N. 1999, ApJ, 514, L103

Clayton, D.D. et al. 1969, ApJ, 155, 75

Clayton, D.D. 1974, ApJ, 188, 155

Drapatz, S. et al. 1980, Mitteilungen der Astronomischen Gesellschaft, 54, 91

Ensman, L. & Woods, S.E. 1988, ApJ, 333, 754

Eracleous, M. et al. 1996, ApJ, 459, 89

Fabian, A.C. & Barcons, X. 1992, ARA&A, 30, 429

Gehrels, N. et al. 1987, ApJ, 322, 215

Georgantopoulos, I. et al. 1997, MNRAS, 291, 203

Ghiselli, G. et al. 1994, MNRAS, 267, 743

Grandi, P. et al. 1997, ApJ, 487, 636

Gruber, D.E., Matteson, J.L., Nolan, P.L., Knight, F.K., Baity, W.A., Rothschild, R.E., Peterson, L.E., Hoffman, J.A., Scheepmaker, A., Wheaton, W.A., Primini, F.A., Levine, A.M. & Lewin, W.H.G. 1980, ApJ, 240, L127

Guilbert, P.W. & Rees, M.J. 1988, MNRAS, 233, 475

Hashimoto, M. et al. 1989, A&A, 40, 91

Holt, S.S., Gotthelf, E.V., Tsunemi, H. & Negoro, H. 1994, PASJ, 46, 4

Iyudin, A.F. et al. 1994, A&A, 284, L1.

Keohane, J.W., Petre, R., Gotthelf, E.V., Ozaki, M. & Koyama, K. 1997, ApJ, 484, 350

Keohane, J. et al. 1997, ApJ, 466, 309

Koyama, K. et al. 1997, PASJ, 49, L7

Koyama, K., Petre, R., Gotthelf, E.V., Hwang, U., Matsura, M., Ozaki, M. & Holt, S.S. 1995, Nature, 378, 255

Koyama, K. et al. 1995, Nature, 378, 255

Krolik, J.H. et al. 1994, ApJ, 420, L57

Lightman, A.P. & White, T.R. 1988, ApJ, 335, 57

Lieu, R. et al. 1996, Science, 274, 1335

Luo, D. & McCray, R. 1991, ApJ, 379, 659

Malaguti, G. et al. 1998, A&A, 331, 519

Matt, G. et al. 1991, A&A, 245, 75

Matt, G. 1997, in Proc. of The 2nd AGN National Meeting "From micro- to mega-parsec", eds. A. Comastri, T. Venturi & M. Bellazzinin, Mem. Soc. Astro. It., 68, 127

Matz, S.M. et al. 1988, Nature, 331, 416

Meszaros, P. & Nagel, W. 1985, ApJ, 298, 147

Mitsuda, K. et al. 1989, PASJ, 41, 97

Miller, J.S. & Goodrich, R.W. 1990, ApJ, 355, 456

Nandra, K. & Pounds, K.A. 1994, MNRAS, 268, 405

Nomoto, K. et al. 1984, ApJ, 286, 644

Ohta, K. et al. 1996, ApJ, 458, L57

Parsons, A., Barthelmy, S., Bartlett, L., Gehrels, N., Naya, J., Stahle, C.M., Tueller, J. & Teegarden, B. 1999, "CdZnTe Background Measurements at Balloon Altitudes", submitted to NIM

Perley, R.A. et al. 1984, ApJS, 54, 291

Piro, L. et al. 1990, ApJL, 360, L35

Pounds, K. et al. 1990, Nature, 344, 132

Reynolds, S. 1998, ApJ, 493, 375

Ruiz-Lapuente, P. et al. 1993, ApJ, 417, 547

Urry, C.M. & Padovani, P. 1995, PASP, 107, 803

Sarazin, C.L. & Lieu, R. 1998, ApJ, 494, L177

Schonfelder, V. et al. 1996, A&A, in press

Serlemitsos, P.J. & Soong, Y. 1995, Exp. Astron.

Smith, B.W., Bloch, J.J. & Rousel-Dupre, D. 1990, Optical Engineering, 29, 592

Sunyaev, R.A. et al. 1991, Sov. Astron. Lett., 17(2), 123

Tamura, K. et al. 1997, Proc. SPIE 3113, in Grazing Incidence and Multilayer X-ray Optical Systems, eds. R. B. Hoover & A. B. Walker, 285

The, L.S. et al. 1995, ApJ, 444, 244

The, L.S. et al. 1996, A&A, in press

Thielemann, F.K. et al. 1990, ApJ, 349, 222

Trumper, J., Pietsch, W., Reppin, C., Voges, W., Staubert, R. & Kendziorra, E. 1978, ApJ, 219, L105

Tueller, J., Cline, T.L., Teegarden, B.J., Paciesas, W.S., Boclet, D., Durouchoux, P.H., Hameury, J.M., Prantzos, N. & Haymes, R.C. 1984, ApJ, 279, 177

Tueller, J. et al. 1990, ApJ, 351, L41

Turner, T.J. et al. 1997, ApJS, 113, 23

Van der Bergh, S. & Tammann, G.A. 1991, ARA&A, 29, 363

Wang, J.C.L., Lamb, D.Q., Loredo, T.J., Wasserman, I.M. & Salpeter, E.E. 1989, Physical Review Letters, 63, 1550

Weaver, K.A. et al. 1997, ApJ, 474, 675

Wheaton, W.A., Doty, J.P., Primini, F.A., Cooke, B.A., Dobson, C.A., Goldman, A., Hecht, M., Howe, S.K., Hoffman, J.A. & Scheepmaker, A. 1979, Nature, 282, 240

White, N.E. et al. 1994, in X-ray Binaries, eds. W.H.G. Lewin, J. Van Paradijs & E.P.J. van den Heuvel (Cambridge; CUP)

Wilson, C.K. & Rothschild, R.E. 1983, ApJ, 274, 717

Woosley, S.E. & Hoffman, R.D. 1991, ApJ, 368, L31

Woosley, S.E. & Weaver, T.A. 1982, in Essays in Nuclear Astrophysics, eds. C.A. Barnes, D.D. Clayton & D.N. Schramm, Cambridge University Press, 377

Yamashita, A. & Inoue H. 1996, in X-ray Imaging and Spectroscopy of Cosmic Hot Plasmas, eds. Makino F. & Mitsuda K., Universal Acad. Press, Tokyo, 313

Yamashita, K., Serlemitsos, P.J., Tueller. J., Barthelmy, S.D., Barlett, L.M., Chan, K., Furuzawa, A., Gehrels, N., Haga, K., Kuneda, H., Kurczynski, P., Lodha, G., Nakajo, N., Nakamura, N., Namba, Y., Ogasaka, Y., Okaijima, T., Palmer, D., Parsons, A., Soong, Y., Stahl, C.M., Takata, H., Tamura, K., Tawara, Y. & Teegarden, B.J. 1999, "Supermirror Hard X-ray Telescope"