REFERENCES

1. G.E. Allen et al. Ap. J. 487 (1997) L97-100
2. G.F. Bignami et al. Ap. J. 232 (1979) 649-658
3. J.B.G.M. Bloemen. A. R. A. & A. 27 (1989) 469-517
4. H. Bloemen, A.M. Bykov. Proceedings of the 4th Compton Symposium. AIP Conference Proceedings. 410 (1997) 249-268
5. H. Bloemen et al. A.&A. 281 (1994) L5-8
6. H. Bloemen et al. Ap. J. 475 (1997) L25-28
7. A. Chen, J. Dwyer, P. Kaaret. Ap. J. 463 (1996) 169-180
8. L.W. Chen, A.C. Fabian, K.C. Gendreau. M.N.R.A.S. 285 (1997) 449-471
9. A. Dar, N. Shaviv. P.R.L. 75 (1995) 3052-3055
10. C.D. Dermer, J.G. Skibo. Ap. J. 487 (1997) L57-60
11. S.W. Digel et al. Ap. J. 463 (1996) 609-622
12. S.W. Digel et al. Ap. J. 441 (1995) 270-280
13. A.D. Erlykin et al. A. & A.S. 120 (1996a) C397-401
14. A.D. Erlykin et al. A. & A.S. 120 (1996b) C415-418
15. A.D. Erlykin, A.W. Wolfendale. J.Phys. G 21 (1995) 1149-1165
16. J. Esposito et al. Ap. J. 461 (1996) 820-827
17. C.E. Fichtel et al. Ap. J. 198 (1975) 163-182
18. N.Y. Gnedin, J.P. Ostriker. Ap. J. 400 (1992) 1-20
19. M.J. Harris et al. Ap. J. 362 (1990) 135-146
20. S.D. Hunter et al. Ap. J. 481 (1997) 205-240
21. H. Kaneda. PhD Dissertation. University of Tokyo (1997)
22. S.C. Kappadath et al. A. & A.S. 120 (1996) C619-622
23. S.C. Kappadath S.C. et al. Proceedings of the 4th Compton Symposium. AIP Conference Proceedings. 410 (1997) 1218-1221
24. J.W. Keohane et al. Ap. J. 484 (1997) 350-359
25. K. Koyama et al. Nature 378 (1995) 255-258
26. K. Koyama et al. P.A.S.J. 49 (1997) L7-11
27. M. Leventhal, C.J. MacCallum, P.D. Stang. Ap. J. 225 (1978) L11-14
28. M. Leventhal et al. Ap. J. 260 (1982) L1-4
29. G.G. Lichti, G.F. Bignami, J.A. Paul. Ap. & S.S. 56 (1978) 403-414
30. J.R. Mattox et al. Ap. J. 481 (1997) 95-115
31. K. McNaron-Brown et al. Ap. J. 451 (1995) 575-584
32. A.H. Minter, S.R. Spangler. Ap. J. 485 (1997) 182-194
33. M. Mori. Ap. J. 478 (1997) 225-232
34. R. Mukherjee et al. Ap. J. 490 (1997) 116-135
35. R.J. Murphy et al. Ap. J. 473 (1996) 990-997
36. A. Mücke et al. A.&A. 320 (1997) 33-40
37. A. Mücke, M. Pohl. Proceedings of the 4th Compton Symposium. AIP Conference Proceedings. 410 (1997) 1233-1236
38. A. Mücke, M. Pohl. M.N.R.A.S. (1998) submitted
39. J.L. Osborne, A.W. Wolfendale, J. Zhang. J.Phys. G 20 (1994) 1089-1101
40. P. Padovani et al. M.N.R.A.S. 260 (1993) L21-24
41. D.N. Page, S.W. Hawking. Ap. J. 206 (1976) 1-7
42. M. Pohl. A.&A. (1998) submitted
43. M. Pohl. A.&A. 307 (1996) L57-59
44. M. Pohl et al. A.&A. 326 (1997a) 51-58
45. M. Pohl et al. Ap. J. 491 (1997b) 159-164
46. M. Pohl, J. Esposito. Ap. J. 507 (1998) 327-338
47. W.R. Purcell et al. Ap. J. 491 (1997) 725-748
48. W.R. Purcell et al. A. & A.S. 120 (1996) C389-392
49. R. Ramaty et al. Ap. J. 392 (1992) L63-66
50. R. Ramaty, B. Kozlovsky, R.E. Lingenfelter. Ap.J.S. 40 (1979) 487-526
51. G.R. Riegler et al. Ap. J. 248 (1981) L13-16
52. S. Rudaz, F.W. Stecker. Ap. J. 368 (1991) 406-410
53. R. Schlickeiser. A.&A. 319 (1997) L5-8
54. R. Schlickeiser, J.A. Miller. Ap. J. 492 (1998) 352-378
55. V. Schönfelder, F. Graml, F.-P. Penningsfeld Ap. J. 240 (1980) 350-362
56. G. Setti, L. Woltjer. Ap.J.S. 436 (1994) 629-632
57. G.H. Share, R.J. Murphy, J. Ryan. Proceedings of the 4th Compton Symposium. AIP Conference Proceedings. 410 (1997) 17-36
58. J. Silk, M. Srednicki. P.R.L. 53 (1984) 624-627
59. J.G. Skibo et al. Ap. J. 483 (1997) L95-98
60. J.G. Skibo. PhD Dissertation University of Maryland (1993)
61. J.G. Skibo, R. Ramaty. A. & A.S. 97 (1993) 145-148
62. J.G. Skibo, R. Ramaty, W.R. Purcell. A. & A.S. 120 (1996) C403-406
63. J.G. Skibo, R. Ramaty, M. Leventhal. Ap. J. 397 (1992) 135-147
64. P. Sreekumar et al. Ap. J. 494 (1998) 523-534
65. P. Sreekumar et al. P.R.L. 70 (1993) 127-129
66. P. Sreekumar et al. Ap. J. 400 (1992) L67-70
67. F.W. Stecker, D.L. Morgan, J. Bredekamp. P.R.L. 27 (1971) 1469-1472
68. F.W. Stecker, M.H. Salamon, M. Malkan. Ap. J. 410 (1993) L71-74
69. A.W.Strong, J.R. Mattox. A.&A. 308 (1996) L21-25
70. A.W.Strong et al. A.&A. 292 (1994) 82-91
71. A.W.Strong et al. A. & A.S. 120 (1996) C381-388
72. S.J. Sturner, C.D. Dermer. Ap. J. 461 (1996) 872-883
73. S.J. Sturner, C.D. Dermer. A.&A. 293 (1995) L17-20
74. T. Tanimori et al. Ap. J. 497 (1998) L25-28
75. L.-S. The, M.D. Leising, D.D. Clayton. Ap. J. 403 (1993) 32-36
76. J.I. Trombka et al. Ap. J. 212 (1977) 925-936
77. J. Tueller. Proc. Compton Symp., Eds. Friedlander and Gehrels, New York, AIP 280 (1993) 97-100
78. A. Valinia, F.E. Marshall. Ap. J. 505 (1998) 134-147, astro-ph/9804012
79. K. Watanabe et al. Proceedings of the 4th Compton Symposium. AIP Conference Proceedings. 410 (1997) 1223-1226
80. R.S. White et al. Ap. J. 218 (1977) 920-927
81. I.-A. Yadigaroglu, R.W. Romani. Ap. J. 476 (1997) 347-356
82. I.-A. Yadigaroglu, R.W. Romani. Ap. J. 449 (1995) 211-215
83. N.Y. Yamasaki et al. A. & A.S. 120 (1996) C393-396
84. N.Y. Yamasaki et al. Ap. J. 481 (1997) 821-831
85. A.A. Zdiarski. M.N.R.A.S. 281 (1996) L9-12