C
Cristian Vignali
Researcher at INAF
Publications - 563
Citations - 29577
Cristian Vignali is an academic researcher from INAF. The author has contributed to research in topics: Galaxy & Active galactic nucleus. The author has an hindex of 85, co-authored 529 publications receiving 27128 citations. Previous affiliations of Cristian Vignali include Pennsylvania State University & University of Concepción.
Papers
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XMM-Newton reveals a Seyfert-like X-ray spectrum in the z=3.6 QSO B1422+231
Mauro Dadina,Cristian Vignali,Massimo Cappi,Giorgio Lanzuisi,Gabriele Ponti,B. De Marco,George Chartas,Margherita Giustini +7 more
TL;DR: In this paper, a single epoch, high-quality X-ray spectrum of the z=3.62 quasar B1422+231 whose flux is enhanced by gravitationally lensing is presented.
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On the nature of X-ray Bright Optically Normal galaxies
Andrea Comastri,Marcella Brusa,Paolo Ciliegi,M. Mignoli,Fabrizio Fiore,Roberto Maiolino,Paola Severgnini,Alessandro Baldi,S. Molendi,Cristian Vignali,F. La Franca,Giorgio Matt,G. C. Perola +12 more
TL;DR: In this article, a population of optically dull, X-ray bright galaxies emerging at 2-10 keV fluxes of the order of 10−14− erg cm^{-2} s^{-1}.
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Resolving the Source Populations that Contribute to the X-ray Background: The 2 Ms Chandra Deep Field-North Survey
David M. Alexander,Franz E. Bauer,W. N. Brandt,Gordon P. Garmire,Ann Hornschemeier,Donald P. Schneider,Cristian Vignali +6 more
TL;DR: The Chandra Deep Field-North (CDF-N) survey provides the deepest view of the Universe in the 0.5-8.0 keV band as mentioned in this paper. But, the Chandra survey is limited to on-axis X-ray observations.
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The HELLAS2XMM survey. XIII. Multi-component analysis of the spectral energy distribution of obscured AGN
Francesca Pozzi,Francesca Pozzi,Cristian Vignali,Cristian Vignali,Andrea Comastri,E. Bellocchi,Jacopo Fritz,Carlotta Gruppioni,M. Mignoli,Roberto Maiolino,Lucia Pozzetti,Marcella Brusa,Fabrizio Fiore,G. Zamorani +13 more
TL;DR: In this article, the authors combine near-to-mid-IR Spitzer data with shorter wavelength observations (optical to X-rays) to get insights on the properties of a sample of luminous, obscured Active Galactic Nuclei (AGN).
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The most obscured AGN in the COSMOS field
Giorgio Lanzuisi,Giorgio Lanzuisi,Michele Perna,Michele Perna,Ivan Delvecchio,Ivan Delvecchio,S. Berta,Marcella Brusa,Marcella Brusa,Nico Cappelluti,Andrea Comastri,Roberto Gilli,Carlotta Gruppioni,M. Mignoli,Francesca Pozzi,Francesca Pozzi,G. Vietri,Cristian Vignali,Cristian Vignali,G. Zamorani +19 more
TL;DR: In this paper, the authors presented the identification and multi-wavelength properties of a heavily obscured (NH>~10^25 cm^-2), intrinsically luminous (L(2-10keV)>10^44 erg s^-1) AGN at z=0.353 in the COSMOS field.