Resolving the extragalactic hard X-ray background

Nature

Volumn 404, Issue 6777, 2000, Pages 459-464

  Mushotzky, R F ^a   Cowie, L L ^b   Barger, A J ^b   Arnaud, K A ^a,c  

^a NASA GODDARD SPACE FLIGHT CENTER   (United States)

^b UNIVERSITY OF HAWAII   (United States)

^c Bldg 142   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; COSMOS; IMAGE QUALITY; PHOTOMETRY; PRIORITY JOURNAL; RADIATION DETECTION; SPECTROSCOPY; THERMAL ANALYSIS; X RAY ANALYSIS;

EID: 0034732086     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/35006564     Document Type: Article

References (43)

1. Giacconi, R., Gursky, H., Paolini, F. & Rossi, B. Evidence for X-rays from sources outside the solar system. Phys. Rev. Lett. 9, 439-443 (1962).
2. Mather, J. C. et al. Measurement of the cosmic microwave background spectrum by the COBE FIRAS instrument. Astrophys. J. 420, 439-444 (1994).
3. Wright, E. L. et al. Interpretation of the COBE FIRAS CMBR spectrum. Astrophys. J. 420, 450-456 (1994).
4. Hasinger, G. et al. The ROSAT deep survey. I. X-ray sources in the Lockman field. Astron. Astrophys. 329, 482-494 (1998).
5. Schmidt, M. et al. The ROSAT deep survey. II. Optical identification, photometry and spectra of X-ray sources in the Lockman field. Astron. Astrophys. 329, 495-503 (1998).
6. Ueda, Y. et al. A population of faint galaxies that contribute to the cosmic X-ray background. Nature 391, 866-868 (1998).
7. Ueda, Y. et al. Log N-log S relations and spectral properties of sources from the ASCA large sky survey: their implications for the origin of the cosmic X-ray background (CXB). Astrophys. J. 518, 656-671 (1999).
8. Ueda, Y., Takahashi, T., Ishisaki, Y., Ohashi, T. & Makishima, K. The ASCA medium sensitivity survey (the GIS catalog project): source counts and evidence for emerging population of hard sources. Astrophys. J. 524, L11-L14 (1999).
9. Cagnoni, I., Della Ceca, R. & Maccacaro, T. A medium survey of the hard X-ray sky with the ASCA gas imaging spectrometer: The (2-10keV) number counts relationship. Astrophys. J. 493, 54-61 (1998).
10. Fiore, F. et al. The contribution of faint AGN to the hard X-ray background. Mon. Not. R. Astron. Soc. 306, L55-L60 (1999).
11. Weisskopf, M. C. The Chandra X-ray Observatory (CXO): an overview. In Proc. NATO ASI 'The Neutron Star-Black Hole Connection' (in the press); also as preprint astro-ph/9912097 at 〈http:// xxx.lanl.gov〉 (1999).
12. Lilly, S. J., Cowie, L. L. & Gardner, J. P. A deep imaging and spectroscopic survey of faint galaxies. Astrophys. J. 369, 79-105 (1991).
13. Songaila, A., Cowie, L. L., Hu, E. M. & Gardner, J. P. The Hawaii K band galaxy survey III. Spectroscopy of K < 20 galaxies. Astrophys. J. Suppl. Ser. 94, 461-515 (1994).
14. Windhorst, R. A. et al. Identification of faint radio sources with optically luminous interacting disk galaxies. Nature 375, 471-474 (1995).
15. Barger, A. J., Cowie, L. L. & Sanders, D. B. Resolving the submillimeter background. Astrophys. J. 518, L5-L8 (1999).
16. Murdoch, H. S., Crawford, D. F. & Jauncey, D. L. Maximum likelihood estimation of the number-flux density distribution of radio sources in the presence of noise and confusion. Astrophys. J. 183, 1-13 (1973).
17. Cowie, L. L., Songaila, A., Hu, E. M. & Cohen, J. G. New insight on galaxy formation and evolution from Keck spectroscopy of the Hawaii deep fields. Astron. J. 112, 839-864 (1996).
18. Wilson, G., Cowie, L. L., Barger, A. J. & Burke, D. J. The evolution of the universal ultraviolet luminosity density with redshift. Astrophys. J. (submitted).
19. Marshall, F. et al. The diffuse X-ray background spectrum from 3 to 50 keV. Astron. J. 235, 4-10 (1980).
20. Chen, L.-W., Fabian, A. C. & Gendreau, K. C. ASCA and ROSAT observations of the QSF3 field: the X-ray background in the 0.1-7 keV band. Mon. Not. R. Astron. Soc. 285, 449-471 (1997).
21. Gendreau, K. C. et al. ASCA observations of the spectrum of the X-ray background. Publ. Astron. Soc. Jpn 47, L5-L9 (1995).
22. Miyaji, T. et al. The cosmic X-ray background spectrum observed with ROSAT and ASCA, Astron. Astrophys. 334, L13-L16 (1998).
23. Ishisaki, Y. et al. Astrophys. J. (submitted).
24. Vecchi, A., Molendi, S., Guainazzi, M., Fiore, F. & Parmar, A. N. The BeppoSAX 1-8 keV cosmic background spectrum. Astron. Astrophys. 349, L73-L76 (1999).
25. Hasinger, G. et al. A deep X-ray survey in the Lockman hole and the soft X-ray log N-log S. Astron. Astrophys. 275, 1-15 (1993).
26. Almaini, O. et al. A deep ROSAT survey. XII. The X-ray spectra of faint ROSAT sources. Mon. Not. R. Astron. Soc. 282, 295-303 (1996).
27. Setti, G. & Woltjer, L. Active galactic nuclei and the spectrum of the X-ray background. Astron. Astrophys. 224, L21-L23 (1989).
28. Madau, P., Ghisellini, G. & Fabian, A. C. The unified Seyfert scheme and the origin of the cosmic X-ray background. Mon. Not. R. Astron. Soc. 270, L17-L21 (1994).
29. Matl, G. & Fabian, A. C. Spectral constraints on Seyfert 2 galaxies as major contributors to the hard (3-100 keV) X-ray background. Mon. Not. R. Astron. Soc. 267, 187-192 (1994).
30. Comastri, A., Setti, G., Zamorani, G. & Hasinger, G. The contribution of AGNs to the X-ray background. Astron. Astrophys. 296, 1-12 (1995).
31. Zdziarski, A. A., Johnson, W. N., Done, C., Smith, D. & McNaron-Brown, K. The average X-ray/ gamma-ray spectra of Seyfert galaxies from GINGA and OSSE and the origin of the cosmic X-ray background. Astrophys. J. 438, L63-L66 (1995).
32. Smith, D. A. & Done, C. Unified theories of active galactic nuclei: a hard X-ray sample of Seyfert 2 galaxies. Mon. Not. R. Astron. Soc. 280, 355-377 (1996).
33. Gilli, R., Risaliti, G. & Salvati, M. Beyond the standard model for the cosmic X-ray background. Astron. Astrophys. 347, 424-433 (1999).
34. Schmidt, M., Giacconi, R., Hasinger, G., Trüper, J. & Zamorani, G. The X-ray luminosity function of active galactic nuclei. In Highlights in X-ray Astronomy (Max-Planck Institut für Extraterrestrische Physik report, in the press); also as preprint astro-ph/9908295 at 〈http://xxx.lanl.gov〉 (1999).
35. Miyaji, T., Hasinger, G. & Schmidt, M. Soft X-ray AGN luminosity function from ROSAT surveys I. Astron. Astrophys. (in the press); also as preprint astro-ph/9910410 at 〈http://xxx.lanl.gov〉 (1999).
36. Moran, E. C., Helfand, D. J., Becker, R. H. & White, R. L. The Einstein two-sigma catalog silver needles in the X-ray haystack. Astrophys. J. 461, 127-145 (1996).
37. Allen, S. W., Di Matteo, T. & Fabian, A. C. Hard X-ray emission from elliptical galaxies. Mon. Not. R. Astron. Soc. (in the press); also as preprint astro-ph/9905052 at 〈http://xxx.lanl.gov〉 (1999).
38. Di Matteo, T. & Allen, S. W. Hard X-ray emission from elliptical galaxies and its contribution to the X-ray background. Astrophys. J. 527, L21-L24 (1999).
39. Haiman, Z. & Loch, A. X-ray emission from the first quasars. Astrophys. J. 521, L9-L13 (1999).
40. Hughes, D. H. et al. High-redshift star formation in the Hubble deep field revealed by a submillimetre-wavelength survey. Nature 394, 241-247 (1998).
41. Barger, A. J. et al. Submillimetre-wavelength detection of dusty star-forming galaxies at high redshift. Nature 394, 248-251 (1998).
42. Gunn, K. F. & Shanks, T. Implications of an obscured AGN model for the X-ray background at submillimeter and far-infrared wavelengths. Mon. Not. R. Astron. Soc. (submitted); also as preprint astro-ph/9909089 at 〈http://xxx.lanl.gov〉 (1999).
43. Piccinotti, G. et al. A complete X-ray sample of the high latitude (|b| > 20°) sky from HEAO 1 A-2: log N-log S and luminosity functions. Astrophys. J. 253, 485-503 (1982).