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Journal Article (19)

  1. 1.
    Rigopoulou, D.; Mainieri, V.; Almaini, O.; Alonso-Herrero, A.; Huang, J.-S.; Hasinger, G.; Rieke, G.; Dunlop, J.; Lehmann, I.: Spectral energy distributions of type 2 quasi-stellar objects: obscured star formation at high redshifts. Monthly Notices of the Royal Astronomical Society 400 (3), pp. 1199 - 1207 (2009)
  2. 2.
    Brusa, M.; Zamorani, G.; Comastri, A.; Hasinger, G.; Cappelluti, N.; Civano, F.; Finoguenov, A.; Mainieri, V.; Salvato, M.; Vignali, C. et al.; Elvis, M.; Fiore, F.; Gilli, R.; Impey, C. D.; Lilly, S. J.; Mignoli, M.; Silverman, J.; Trump, J.; Urry, C. M.; Bender, R.; Capak, P.; Huchra, J. P.; Kneib, J. P.; Koekemoer, A.; Leauthaud, A.; Lehmann, I.; Massey, R.; Matute, I.; McCarthy, P. J.; McCracken, H. J.; Rhodes, J.; Scoville, N. Z.; Taniguchi, Y.; Thompson, D.: The XMM-Newton wide-field survey in the COSMOS field - III. Optical identification and multiwavelength properties of a large sample of X-ray-selected sources. Astrophysical Journal Supplement Series 172 (1), pp. 353 - 367 (2007)
  3. 3.
    Hasinger, G.; Cappelluti, N.; Brunner, H.; Brusa, M.; Comastri, A.; Elvis, M.; Finoguenov, A.; Fiore, F.; Franceschini, A.; Gilli, R. et al.; Griffiths, R. E.; Lehmann, I.; Mainieri, V.; Matt, G.; Matute, I.; Miyaji, T.; Molendi, S.; Paltani, S.; Sanders, D. B.; Scoville, N.; Tresse, L.; Urry, C. M.; Vettolani, P.; Zamorani, G.: The XMM-Newton wide-field survey in the COSMOS field - I. Survey description. Astrophysical Journal Supplement Series 172 (1), pp. 29 - 37 (2007)
  4. 4.
    Mainieri, V.; Hasinger, G.; Cappelluti, N.; Brusa, M.; Brunner, H.; Civano, F.; Comastri, A.; Elvis, M.; Finoguenov, A.; Fiore, F. et al.; Gilli, R.; Lehmann, I.; Silverman, J.; Tasca, L.; Vignali, C.; Zamorani, G.; Schinnerer, E.; Impey, C.; Trump, J.; Lilly, S.; Maier, C.; Griffiths, R. E.; Miyaji, T.; Capak, P.; Koekemoer, A.; Scoville, N.; Shopbell, P.; Taniguchi, Y.: The XMM-Newton wide-field survey in the COSMOS field - IV. X-ray spectral properties of active galactic nuclei. Astrophysical Journal Supplement Series 172 (1), pp. 368 - 382 (2007)
  5. 5.
    Page, M. J.; Lehmann, I.; Boller, T.; Watson, M. G.; Dwelly, T.; Hess, S.; Matute, I.; Loaring, N. S.; Rosen, S.; Ziaeepour, H. et al.; Schwope, A.; Lamer, G.; Carrera, F. J.; Tedds, J.; Della Ceca, R.; Severgnini, P.; McMahon, R. G.; Yuan, W.: The XMM-SSC survey of hard-spectrum XMM–Newton sources – I. Optically bright sources. Monthly Notices of the Royal Astronomical Society 378 (4), pp. 1335 - 1355 (2007)
  6. 6.
    Gallo, L. C.; Lehmann, I.; Pietsch, W.; Boller, T.; Brinkmann, W.; Friedrich, P.; Grupe, D.: XMM–Newton observations of bright ROSAT selected active galactic nuclei with low intrinsic absorption. Monthly Notices of the Royal Astronomical Society 365 (2), pp. 688 - 698 (2006)
  7. 7.
    Miyaji, T.; Hasinger, G.; Lehmann, I.; Schneider, D. P.: Chandra observations of six QSOs at z ~ 3. Astronomical Journal 131 (2), pp. 659 - 665 (2006)
  8. 8.
    Sturm, E.; Hasinger, G.; Lehmann, I.; Mainieri, V.; Genzel, R.; Lehnert, M. D.; Lutz, D.; Tacconi, L. J.: Mid-infrared Spitzer spectra of X-ray-selected Type 2 QSOs: QSO2s are not ultraluminous infrared galaxies. Astrophysical Journal 642 (1 Part 1), pp. 81 - 86 (2006)
  9. 9.
    Lehmann, I.; Becker, T.; Fabrika, S.; Roth, M.; Miyaji, T.; Afanasiev, V.; Sholukhova, O.; Sánchez, S. F.; Greiner, J.; Hasinger, G. et al.; Costantini, E.; Surkov, A.; Burenkov, A.: Integral field spectroscopy of the ultraluminous X-ray source Holmberg II X-1. Astronomy & Astrophysics 431 (3), pp. 847 - 860 (2005)
  10. 10.
    Mainieri, V.; Rosati, P.; Tozzi, P.; Bergeron, J.; Gilli, R.; Hasinger, G.; Nonino, M.; Lehmann, I.; Alexander, D. M.; Idzi, R. et al.; Koekemoer, A. M.; Norman, C.; Szokoly, G.; Zheng, W.: The Chandra deep field south/GOODS survey - optically faint X-ray sources. Astronomy & Astrophysics 437 (3), pp. 805 - 821 (2005)
  11. 11.
    Mainieri, V.; Rigopoulou, D.; Lehmann, I.; Scott, S.; Matute, I.; Almaini, O.; Tozzi, P.; Hasinger, G.; Dunlop, J. S.: Submillimetre detection of a high-redshift type 2 QSO. Monthly Notices of the Royal Astronomical Society 356 (4), pp. 1571 - 1575 (2005)
  12. 12.
    Mateos, S.; Barcons, X.; Carrera, F. J.; Ceballos, M. T.; Hasinger, G.; Lehmann, I.; Fabian, A. C.; Streblyanska, A.: XMM-Newton observations of the Lockman Hole IV: spectra of the brightest AGN. Astronomy & Astrophysics 444 (1), pp. 79 - 99 (2005)
  13. 13.
    Della Ceca, R.; Maccacaro, T.; Caccianiga, A.; Severgnini, P.; Braito, V.; Barcons, X.; Carrera, F. J.; Watson, M. G.; Tedds, J. A.; Brunner, H. et al.; Lehmann, I.; Page, M. J.; Lamer, G.; Schwope, A.: Exploring the X-ray sky with the XMM-Newton bright serendipitous survey. Astronomy & Astrophysics 428 (2), pp. 383 - 399 (2004)
  14. 14.
    Dewangan, G. C.; Miyaji, T.; Griffiths, R. E.; Lehmann, I.: A transition to a low/soft state in the ultraluminous compact X-ray source Holmberg II X-1. The Astrophysical Journal 608, pp. L57 - L60 (2004)
  15. 15.
    Scholz, R.-D.; Lehmann, I.; Matute, I.; Zinnecker, H.: The nearest cool white dwarf (d ~ 4 pc), the coolest M-type subdwarf (sdM9.5), and other high proper motion discoveries. Astronomy & Astrophysics 425 (2), pp. 519 - 527 (2004)
  16. 16.
    Szokoly, G. P.; Bergeron, J.; Hasinger, G.; Lehmann, I.; Kewley, L.; Mainieri, V.; Nonino, M.; Rosati, P.; Giacconi, R.; Gilli, R. et al.; Gilmozzi, R.; Norman, C.; Romaniello, M.; Schreiber, E.: The Chandra deep field-south: optical spectroscopy. I. The Astrophysical Journal - Supplement Series 155, pp. 271 - 349 (2004)
  17. 17.
    Boller, T.; Voges, W.; Dennefeld, M.; Lehmann, I.; Predehl, P.; Burwitz, V.; Perlman, E.; Gallo, L.; Papadakis, I.E.; Anderson, S.: 1ES 1927+654: Persistent and rapid X-ray variability in an AGN with low intrinsic neutral X-ray absorption and narrow optical emission lines. Astronomy & Astrophysics 397 (2), pp. 557 - 564 (2003)
  18. 18.
    Boller, T.; Keil, R.; Hasinger, G.; Costantini, E.; Fujimoto, R.; Anabuki, N.; Lehmann, I.; Gallo, L.: XMM-Newton observation of the ULIRG NGC 6240. The physical nature of the complex Fe K line emission. Astronomy & Astrophysics 411, pp. 63 - 70 (2003)
  19. 19.
    Ciliegi, P.; Zamorani, G.; Hasinger, G.; Lehmann, I.; Szokoly, G.; Wilson, G.: A deep VLA survey at 6 cm in the Lockman Hole. Astronomy & Astrophysics 398 (3), pp. 901 - 918 (2003)

Conference Paper (4)

  1. 20.
    Sturm, E.; Lutz, D.; Genzel, R.; Hasinger, G.; Mainieri, V.; Tacconi, L. J.; Lehnert, M.; Lehmann, I.: The mid-infrared spectra of X-ray selected type 2 QSOs. In: The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution, pp. 391 - 397 (Eds. Chary, R.-R.; Teplitz, H.I.; Sheth, K.). The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution, Pasadena, California, USA, November 14, 2005 - November 16, 2005. Astronomical Society of the Pacific, San Francisco, CA, USA (2008)
 
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