REFERENCES
- Akiyama, M., Ueda, Y., Ohta, K., Takahashi, T.,
& Yamada, T.
2003, ApJS, 148, 275
- Alexander, D. M., Brandt, W. N., Hornschemeier,
A. E., Garmire, G. P., Schneider, D. P., Bauer, F. E., & Griffiths, R.
2001, AJ, 122, 2156
- Almaini, O., Lawrence, A., & Boyle, B. J.
1999, MNRAS, 305, 59
- Anderson, S. F., et al.
2003, AJ, 126, 2209
- Andreani, P., Spinoglio, L., & Malkan, M. A.
2003, ApJ, 597, 759
- Antonucci, R.
1993, ARA&A, 31, 473
- Appenzeller, I., Zickgraf, F.-J., Krautter, J.,
& Voges, W.
2000, A&A, 364, 443
- Arp, H. C., Khachikian, E. Y., Lynds, C. R., &
Weedman, D. W.
1968, ApJ, 152, 103
- Baade, W., & Minkowski, R.
1954, ApJ, 119, 215
- Barger, A. J., Cowie, L. L., Brandt, W. N., Capak,
P., Garmire, G. P., Hornschemeier, A. E., Steffen, A. T., & Wehner,
E. H.
2002, AJ, 124, 1839
- Barger, A. J., Cowie, L. L., Capak, P., Alexander,
D. M., Bauer, F. E., Brandt, W. N., Garmire, G. P., & Hornschemeier,
A. E.
2003a, ApJ, 584, L61
- Barger, A. J., Cowie, L. L., Mushotzky, R. F., &
Richards, E. A.
2001, AJ, 121, 662
- Barger, A. J., et al.
2003b, AJ, 126, 632
- Barcons, X.
2003, AN, 324, 3
- Barcons, X., et al.
2002, A&A, 382, 522
- Boroson, T. A.
2002, ApJ, 565, 78
- Brandt, W. N., & Boller, Th.
1998, AN, 319, 163
- Brandt W. N., Mathur, S., Reynolds, C. S., &
Elvis, M.
1997, MNRAS, 292, 407
- Brunzendorf, J., & Meusinger, H.
2002, A&A, 390, 879
- Burbidge, G. R.
1970, ARA&A, 8, 369
- Burbidge, G. R., Burbidge, E. M., & Sandage, A. R.
1963, Reviews of Modern Physics, Vol. 35, p947
- Cagnoni, I., della Ceca, R., & Maccacaro, T.
1998, ApJ, 493, 54
- Cannon, R. D., Penston, M. V., & Brett, R.
1971, MNRAS, 152, 79
- Chiaberge, M., Macchetto, F. D., Sparks, W. B.,
Capetti, A., & Celotti, A. 2003, in
"Active Galactic Nuclei: from Central Engine to Host
Galaxy", Eds. S. Collin, F. Combes, & I. Shlosman. (San
Francisco: ASP Conference Series), 290, p331
- Colbert, E. J. M., & Ptak, A. F.
2002, ApJS, 143, 25
- Comastri, A., et al.
2003, MSAIS, 3, 179
- Condon, J. J., Anderson, E., & Broderick, J. J.
1995, AJ, 109, 2318
- Condon, J. J., Yin, Q. F., Thuan, T. X., &
Boller, Th.
1998, AJ, 116, 2682
- Cowie, L. L., Barger, A. J., Fomalont, E. B., &
Capak, P.
2004a, ApJ, 603, L69
- Cowie, L. L., Barger, A. J., Hu, E. M., Capak, P.,
& Songaila, A. 2004b, AJ, in press
(astro-ph/0401354)
- Cowie, L. L., Songaila, A., Hu, E. M., & Cohen,
J.
1996, AJ, 112, 839
- Crawford, C. S., Fabian, A. C., Gandhi, P., Wilman,
R. J., & Johnstone, R.
2001, MNRAS, 324, 427
- Curtis, H. D.
1917, PASP, 29, 52
- Cutri, R. M., Nelson, B. O., Francis, P. J., &
Smith, P. S. 2002, in
"AGN Surveys", Eds., R. F. Green, E. Ye. Khachikian,
& D.B. Sanders. (San Francisco: ASP Conference Series), 284, p127
- de Grijp, M. H. K., Lub, J., & Miley, G. K.
1987, A&AS, 70, 95
- Dobrzycki, A., Macri, L. M., Stanek, K. Z., &
Groot, P.
2003, AJ, 125, 1330
- Done, C., Madejski, G. M., Zycki, P.T., &
Greenhill, L. J.
2003, ApJ, 588, 763
- Elvis, M., Schreier, E. J., Tonry, J., Davis, M.,
& Huchra, J. P.
1981, ApJ, 246, 20
- Elvis, M., et al.
1994, ApJS, 95, 1
- Fabian, A. C. 2000, in
"Large Scale Structure in the X-ray Universe",
Eds. M. Plionis, & I. Georgantopoulos. (Paris: Atlantisciences), p5
- Fabian, A. C., & Iwasawa, K.
1999, MNRAS, 303, 34
- Fan, X.
1999, AJ, 117, 2528
- Fath, E. A.
1913, ApJ, 37, 198
- Fiore, F., et al.
2000, New Astronomy, 5, 143
- Fischer, J.-U., et al.
2000, AN, 321, 1
- Gallagher, S. C., Brandt, W. N., Laor, A., Elvis,
M., Mathur, S., Wills, B. J., & Iyomoto, N.
2001, ApJ, 546, 795
- Gilli, R., et al.
2003, ApJ, 592, 721
- Gioia, I. M., Maccacaro, T., Schild, R. E., Wolter,
A., Stocke, J. T., Morris, S. L., & Henry, J. P.
1990, ApJS, 72, 567
- Giveon, U., Maoz, D., Kaspi, S., Netzer, H., &
Smith, P. S.
1999, MNRAS, 306, 637
- Grazian, A., Cristiani, S., D'Odorico, V., Omizzolo,
A., & Pizzella, A.
2000, AJ, 119, 2540
- Greenstein, J. L., & Matthews, T. A.
1963, AJ, 68, 279
- Griffiths, R. E., Schwartz, D. A., Schwarz, J.,
Doxsey, R. E., Johnston, M. D., & Blades, J. C.
1979, ApJ, 230, 21
- Grimm, H.-J., Gilfanov, M., & Sunyaev, R.
2003, MNRAS, 339, 793
- Grogin, N. A., et al.
2003, ApJ, 595, 685
- Grupe, D.
2004, AJ, 127, 1799
- Gursky, H., & Schwartz, D. A.
1977, ARA&A, 15, 541
- Haas, M., et al.
2003, A&A, 402, 87
- Haiman, Z., & Loeb, A.
1999, ApJ, 521, 9
- Hartwick, F. D. A., & Schade, D.
1990, ARA&A, 28, 437
- Hasinger, G. 2004, in
"High Energy Processes and Phenomena in Astrophysics", IAU Symposium
214, Eds. X. Li, Z. Wang, & V. Trimble, in press
(astro-ph/0301040)
- Hasinger, G., Burg, R., Giacconi, R., Schmidt, M.,
Trumper, J., & Zamorani, G.
1998, A&A, 329, 482
- Hasinger, G., Lehmann, I., Giacconi, R., Schmidt,
M., Truemper, J., & Zamorani, G. 1999, in
"Highlights in X-ray Astronomy", Eds. B. Aschenbach,
& M. J. Freyberg. MPE Report 272, p199
- Hewett, P. C., & Foltz, C. B.
1994, PASP, 106, 113
- Ho, L. C.
1999, ApJ, 516, 672
- Ho, L. C., Filippenko, A. V., & Sargent, W. L.
1995, ApJS, 98, 477
- Holt, S. S., Boldt, E. A., Serlemitsos, P. J.,
Murray, S. S., Giacconi, R., Kellogg, E. M., & Matilsky, T. A.
1974, ApJ, 188, 97
- Hornschemeier, A. E., et al.
2003, AN, 324, 12
- Huchra, J., & Burg, R.
1992, ApJ, 393, 90
- Ivezic, Z., et al.
2002, AJ, 124, 2364
- Koekemoer, A., et al.
2004, ApJ, 600, L123
- Koo, D. C., & Kron, R. G.
1988, ApJ, 325, 92
- Kristian, J., Sandage, A., & Katem, B.
1974, ApJ, 191, 43
- Kuraszkiewicz, J. K., et al.
2003, ApJ, 590, 128
- La Franca, F., et al.
2002, ApJ, 570, 100
- Laurent, O., Mirabel, I. F., Charmandaris, V.,
Gallais, P., Madden, S. C., Sauvage, M., Vigroux, L., & Cesarsky, C.
2000, A&A, 359, 887
- Lawrence, A., Elvis, M., Wilkes, B. J., McHardy, I.,
& Brandt, W. N.
1997, MNRAS, 285, 879
- Lehmann, I, et al.
2000, A&A, 354, 35
- Leighly, K. M., Halpern, J. P., & Jenkins, E. B.
2002, BAAS, 34, 1288
- Liu, C. T., Petry, C. E., Impey, C. D., & Foltz,
C. B.
1999, AJ, 118, 1912
- Long, K. S., Charles, P. A., & Dubus, G.
2002, ApJ, 569, 204
- Low, J., & Kleinmann, D. E.
1968, AJ, 73, 868
- Magliocchetti, M., et al.
2002, MNRAS, 333, 100
- Maiolino, R., Marconi, A., Salvati, M., Risaliti,
G., Severgnini, P., Oliva, E., La Franca, F., & Vanzi, L.
2001, A&A, 365, 28
- McHardy, I., et al.
2003, MNRAS, 342, 802
- Meyer, M. J., Drinkwater, M. J., Phillipps, S.,
& Couch, W. J.
2001, MNRAS, 324, 343
- Miller, N., & Owen, F.
2001, AJ, 121, 1903
- Minkowski, R.
1958, PASP, 70, 153
- Miyaji, T., Hasinger, G., & Schmidt, M.
2000, A&A, 353, 25
- Moran, E. C., Filippenko, A. V., & Chornock, R.
2002, ApJ, 579, L71
- Moretti, A., Lazzati, D., Campana, S., &
Tagliaferri, G.
2002, ApJ, 570, 502
- Mushotzky, R. F., Cowie, L. L., Barger, A. J., &
Arnaud, K. A.
2000, Nature, 404, 459
- Mushotzky, R. F., Done, C., & Pounds, K.
1993, ARA&A, 31, 717
- Mushotzky, R. F., & Wandel, A.
1989, ApJ, 339, 674
- Nandra, K., Georgantopoulos, I., Ptak, A., &
Turner, T. J.
2003, ApJ, 582, 615
- Osmer, P. S., & Hewett, P. C.
1991, ApJS, 75, 273
- Osterbrock, D. E.
1991, ApJ, Centennial Issue, 525, 337
- Palunas, P., et al.
2000, ApJ, 541, 61
- Piccinotti, G., Mushotzky, R. F., Boldt, E. A.,
Holt, S. S., Marshall, F. E., Serlemitsos, P. J., & Shafer, R. A.
1982, ApJ, 253, 485
- Pounds, K.
1979, RSPSA, 366, 375
- Pounds, K. A., Cooke, B. A., Ricketts, M. J.,
Turner, M. J., & Elvis, M.
1975, MNRAS, 172, 473
- Puchnarewicz, E. M., et al.
1996, MNRAS, 281, 1243
- Puchnarewicz, E. M., & Mason, K. O.
1998, MNRAS, 293, 243
- Ranalli, P., Comastri, A., & Setti, G.
2003, A&A, 399, 39
- Reeves, J. N., Turner, M. J. L., Ohashi, T., &
Kii, T.
1997, MNRAS, 292, 468
- Remillard, R. A., Bradt, H. V., Buckley, D. A. H.,
Roberts, W., Schwartz, D. A., Tuohy, I. R., & Wood, K.
1986, ApJ, 301, 742
- Richards, G. T., et al.
2001, AJ, 121, 2308
- Richards, G. T., et al.
2002, AJ, 123, 2945
- Risaliti, G., Maiolino, R., & Salvati, M.
1999, ApJ, 522, 157
- Sadler, E., et al.
2002, MNRAS, 329, 227
- Salzer, J. J., et al.
2000, AJ, 120, 80
- Sandage, A.
1965, ApJ, 141, 1560
- Sandage, A. 1971, in
"Proceedings of a Study Week on Nuclei of Galaxies",
Ed. D. J. K. O'Connell. (New York: American Elsevier), p271
- Sarajedini, V. L., Green, R. F., Griffiths, R. E.,
& Ratnatunga, K.
1999, ApJ, 514, 746
- Sargent, W. L. W.
1970, ApJ, 160, 405
- Schartel, N., Schmidt, M., Fink, H. H., Hasinger,
G., & Truemper, J.
1997, A&A, 320, 696
- Schmidt, M.
1963, Nature, 197, 1040
- Schmidt, M. 1969, in
"Quasars and High-Energy Astronomy",
Eds. K. N. Douglas, I. Robinson, A. Schild, E. L. Schucking,
J. A. Wheeler, & N. J. Woolf. (New York: Gordon & Breach), p55
- Schmidt, M., & Green, R. F. L.
1983, ApJ, 269, 352
- Schmidt, M., & Matthews, T. A.
1964, ApJ, 139, 781
- Severgnini, P., et al.
2003, A&A, 406, 483
- Seyfert, C. K.
1943, ApJ, 97, 28
- Slipher, V. M.
1917, Lowell Observatory Bulletin, 3, 59
- Spinoglio, L., & Malkan, M. A.
1989, ApJ, 342, 83
- Spinrad, H., Marr, J., Aguilar, L., &
Djorgovski, S.
1985, PASP, 97, 932
- Steffen, A. T., Barger, A. J., Cowie, L. L.,
Mushotzky, R. F., & Yang, Y.
2003, ApJ, 596, L23
- Turner, T. J., George, I. M., Nandra, K., &
Mushotzky, R. F.
1997, ApJ, 488, 164
- Ueda, Y., Ishisaki, Y., Takahashi, T., Makishima,
K., & Ohashi, T.
2001, ApJS, 133, 1
- Ueda, Y., et al.
1999, ApJ, 518, 656
- Urry, M. 2003, in
"Active Galactic Nulei: from Central Engine to Host
Galaxy", Eds. S. Collin, F. Combes, & I Shlosman.
(San Francisco: ASP Conference Series), 290, p3
- Usher, P. D., & Mitchell, K. J.
1978, ApJ, 223, 1
- Vaughan, S., Edelson, R., Warwick, R. S., Malkan,
M. A., & Goad, M. R.,
2001, MNRAS, 327, 673
- Veilleux, S. 2002, in
"AGN Surveys", Eds. R. F. Green,
E. Ye. Khachikian, & D. B. Sanders. (San Francisco: ASP Conference
Series), 284, p111
- Veron, P., & Hawkins, M. R. S.
1995, A&A, 296, 665
- Vignali, C., et al.
2003, AJ, 125, 2876
- Ward, M., Penston, M. V., Blades, J. C., &
Turtle, A. J.
1980, MNRAS, 193, 563
- Watanabe, S., Akiyama, M., Ueda, Y., Ohta, K.,
Mushotzky, R., Takahashi, T., & Yamada, T.,
2002, PASJ, 54, 683
- Weedman, D. W.
1977, ARA&A, 15, 69
- White, R. L., et al.
2000, ApJS, 126, 133
- Wilkes, B. J., Schmidt, G. D., Cutri, R. M.,
Ghosh, H., Hines, D. C., Nelson, B., & Smith, P. S.
2002, ApJ, 564, 65
- Wilson, A. J.
1979, RSPSA, 366, 367
- Woltjer, L.
1959, ApJ, 130, 38
- Woo, J.-H., & Urry, C. M.
2002, ApJ, 579, 530
- Worrall, D. M.
1987, ApJ, 318, 188
- Yang, Y., Mushotzky, R. F., Barger, A. J., Cowie,
L. L., Sanders, D. B., & Steffen, A. T.
2003, ApJ, 585, L85
- Yun, M. S., Reddy, N., & Condon, J.
2001, ApJ, 554, 803
- Zickgraf, F.-J., Engels, D., Hagen, H.-J., Reimers,
D., & Voges, W.
2003, A&A, 406, 535