A
Andrea Comastri
Researcher at INAF
Publications - 718
Citations - 52821
Andrea Comastri is an academic researcher from INAF. The author has contributed to research in topics: Galaxy & Active galactic nucleus. The author has an hindex of 111, co-authored 706 publications receiving 49119 citations. Previous affiliations of Andrea Comastri include University of Bologna & Max Planck Society.
Papers
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Journal ArticleDOI
NuSTAR Reveals Extreme Absorption in z < 0.5 Type 2 Quasars
George B. Lansbury,Poshak Gandhi,David M. Alexander,Roberto J. Assef,James Aird,A. Annuar,David R. Ballantyne,Mislav Baloković,Franz E. Bauer,S. E. Boggs,W. N. Brandt,M. Brightman,Finn Erland Christensen,Francesca Civano,Andrea Comastri,William W. Craig,A. Del Moro,Brian W. Grefenstette,C. J. Hailey,Fiona A. Harrison,Ryan C. Hickox,Michael Koss,Stephanie M. LaMassa,Birong Luo,Simonetta Puccetti,Daniel Stern,Ezequiel Treister,Cristian Vignali,L. Zappacosta,William W. Zhang +29 more
TL;DR: In this article, the authors make a correction to the intrinsic column density distribution for optically selected type 2 quasars as measured by Chandra and XMM-Newton for 39 objects.
Journal ArticleDOI
Suzaku observation of the Phoenix Galaxy
Giorgio Matt,Simone Bianchi,Hisamitsu Awaki,Andrea Comastri,Matteo Guainazzi,K. Iwasawa,E. Jimenez-Bailon,Fabrizio Nicastro +7 more
TL;DR: In this article, the authors observed a changing-look source, the Phoenix Galaxy, with the aim of better understanding the nature of the variations, and the results compared with previous ASCA and XMM-Newton observations.
Book ChapterDOI
On the X-Ray Emission from the Powerful Radio Galaxies
TL;DR: In this paper, it was shown that the radio galaxies are pervaded both by an intense radiation flux from the misdirected hidden quasar and the cosmic microwave background radiation flux (CMB).
Proceedings ArticleDOI
Resolved Mid-Infrared Imaging of AGN: An Isotropic Measure of Intrinsic Power
P. Gandhi,H. Horst,Alain Smette,Sebastian F. Hönig,Andrea Comastri,Roberto Gilli,Cristian Vignali,W. J. Duschl +7 more
TL;DR: In this paper, the authors show that resolved mid-infrared (mid-IR) imaging of active galactic nuclei is an isotropic probe of their intrinsic luminosities.
Journal Article
1H0419-577: a "two-state" soft X-ray Seyfert galaxy ?
Matteo Guainazzi,Andrea Comastri,G. M. Stirpe,W. N. Brandt,Fabrizio Fiore,K. M. Leighly,Giorgio Matt,S. Molendi,E. M. Puchnarewicz,L. Piro,Aneta Siemiginowska +10 more
TL;DR: In this paper, the authors report on the first simultaneous op- tical and X-ray (Beppo-SAX) observations of the radio-quiet AGN 1H0419-577.