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The Obscured AGN Population Probed by X-ray Observations

Published online by Cambridge University Press:  12 April 2016

K. Iwasawa
K. Iwasawa*
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 OHA, United Kingdom

Abstract

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X-ray properties of obscured AGN are reviewd and recent results obtained from ASCA, BeppoSAX, and Chandra are presented. There is a population of AGN that can only be revealed by hard X-ray observations. Studies of the X-ray background suggest that obscured AGN should significantly outnumber their unobscured counterparts.

Type
Part 3. X-ray Surveys for AGN
Information
International Astronomical Union Colloquium , Volume 184: AGN Surveys , 2002 , pp. 225 - 233
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Altieri, B., et al., 1999, A&A, 343, L65 Google Scholar
Almaini, O., Lawrence, A., Boyle, B.J., 1999, MNRAS, 305, L59 CrossRefGoogle Scholar
Bautz, M.W., et al., 2000, ApJ, 5431 L119 CrossRefGoogle Scholar
Blain, A.W., Phillips, T.G., 2002, MNRAS, 333, 222 CrossRefGoogle Scholar
Brandt, W.N., et al., 2001, AJ, 122, 1 CrossRefGoogle Scholar
Celotti, A., et al., 1995, MNRAS, 277, 1169 CrossRefGoogle Scholar
Comastri, A., et al., 1995, A&A, 296, 1 Google Scholar
Crawford, C.S., et al., 2001, MNRAS, 324, 427 CrossRefGoogle Scholar
Deane, J.R., Trentham, N., 2001, MNRAS, 326, 1467 CrossRefGoogle Scholar
de Grijp, M.H.K., et al., 1985, Nature, 314, 240 CrossRefGoogle Scholar
Fabian, A.C., Iwasawa, K., 1999, MNRAS, 303, L34 CrossRefGoogle Scholar
Fabian, A.C., et al., 2000, MNRAS, 315, L8 CrossRefGoogle Scholar
Fabian, A.C., Crawford, C.S., Iwasawa, K., 2002, MNRAS, 331, L57 CrossRefGoogle Scholar
Fixen, D.J., et al., 1998, ApJ, 508, 123 CrossRefGoogle Scholar
Franceschini, A., 2000, A&A, 353, 910 Google Scholar
Gandhi, P., et al., 2002, MNRAS, submmittedGoogle Scholar
Genzel, R., et al., 1998, ApJ, 498, 579 CrossRefGoogle Scholar
George, I.M., Fabian, A.C., 1991, MNRAS, 249, 352 CrossRefGoogle Scholar
Ghisellini, G., Haardt, F., Matt, G., 1994, MNRAS, 267, 743 CrossRefGoogle Scholar
Giacconi, R., et al., 2001, ApJ, 551, 624 CrossRefGoogle Scholar
Haehnelt, M.G., Natarajan, P., Rees, M.J., 1998, MNRAS, 300, 817 CrossRefGoogle Scholar
Hornschemeier, A., et al., 2000, ApJ, 541, 49 CrossRefGoogle Scholar
Ikebe, Y., et al., 2000, MNRAS, 316, 433 CrossRefGoogle Scholar
Iwasawa, K., et al., 1993, ApJ, 409, 155 CrossRefGoogle Scholar
Iwasawa, K., Comastri, A., 1998, MNRAS, 297, 1219 CrossRefGoogle Scholar
Iwasawa, K., et al., 2001, MNRAS, 326, 894 CrossRefGoogle Scholar
Iwasawa, K. Fabian, A.C., Ettori, S., 2001, MNRAS, 321, L15 CrossRefGoogle Scholar
Kleinmann, S.H., et al., 1988, ApJ, 328, 161 CrossRefGoogle Scholar
Królik, J.H., Kriss, G.A., 2001, ApJ, 561, 684 CrossRefGoogle Scholar
Królik, J.H., Madau, P., Zycki, P.T., 1994, ApJ, 420, L57 CrossRefGoogle Scholar
Lémonon, L., et al., 1998, A&A, 334, L21 Google Scholar
Madau, P., Ghisellini, G., Fabian, A.C., 1994, MNRAS, 270, L17 CrossRefGoogle Scholar
Magorrian, J., et al., 1998, AJ, 115, 2285 CrossRefGoogle Scholar
Marconi, A., et al., 2000, A&A, 357, 22 Google Scholar
Matt, G., et al., 1997, A&A, 325, L13 Google Scholar
Matt, G., Pompilio, F., La Franca, F., 1999, New Astronomy, 4, 191 CrossRefGoogle Scholar
Matt, G., et al, 2000, MNRAS, 318 173 CrossRefGoogle Scholar
Miyaji, T., Hasinger, G., Schmidt, M., 2000, A&A, 353, 25 Google Scholar
Mushotzky, R.F., et al., 2000, Nature, 404, 459 CrossRefGoogle Scholar
Norman, C, et al., 2002, ApJ, 571, 218 CrossRefGoogle Scholar
Risaliti, G., Maiolino, R., Salvati, M., 1999, ApJ, 522, 157 CrossRefGoogle Scholar
Risaliti, G., Elvis, M., Gilli, R., 2002, ApJ, in pressGoogle Scholar
Salucci, P., et al., 1999, MNRAS, 307, 637 CrossRefGoogle Scholar
Setti, G., Waltjer, L., 1989, A&A, 224, L21 Google Scholar
Schlegel, D., et al.1, 1994, ApJ, 427, 527 CrossRefGoogle Scholar
S, oifer.B., et al., 1987, ApJ, 320, 238 Google Scholar
Soltan, A., 1982, MNRAS, 2000, 115 CrossRefGoogle Scholar
Vignati, P., et al., 1999, A&A, 349, L57 Google Scholar
Wilman, R.J., Fabian, A.C., 1999, MNRAS, 309, 862 CrossRefGoogle Scholar
Wilman, R.J., Fabian, A.C., Gandhi, P., 2001, MNRAS, 318, Lll Google Scholar