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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The quest for Type 2 quasars: Chandra observations of luminous obscured quasars in the Sloan Digital Sky Survey
TL;DR: In this article, Chandra exploratory observations of six candidate Type 2 quasars at z = 0.49-0.73 selected among the most [O III] luminous emitters from the Sloan Digital Sky Survey (SDSS) were reported.
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Ultra-deep catalog of X-ray groups in the Extended Chandra Deep Field South
Alexis Finoguenov,Alexis Finoguenov,Masayuki Tanaka,Michael C. Cooper,Viola Allevato,Nico Cappelluti,Ami Choi,Catherine Heymans,Franz E. Bauer,Franz E. Bauer,F. Ziparo,Piero Ranalli,John D. Silverman,W. N. Brandt,Yongquan Xue,John S. Mulchaey,L. M. Howes,L. M. Howes,Christian Schmid,D. Wilman,D. Wilman,Andrea Comastri,Günther Hasinger,V. Mainieri,B. Luo,Paolo Tozzi,P. Rosati,Peter Capak,Paola Popesso +28 more
TL;DR: In this article, the detection, identification and calibration of extended sources in the deepest X-ray dataset to date, the Extended Chandra Deep Field South (ECDF-S), were presented.
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Constraining the black hole mass and accretion rate in the narrow-line seyfert 1 galaxy re j1034)396
E. M. Puchnarewicz,Keith O. Mason,Aneta Siemiginowska,Antonella Fruscione,Andrea Comastri,Fabrizio Fiore,I. Cagnoni +6 more
TL;DR: In this article, the authors present a comprehensive study of the spectrum of the narrow-line Seyfert 1 (NLS1) galaxy RE J1034+396, summarizing the information obtained from the optical to X-rays with observations from the William Herschel 4.2 m Telescope, the Hubble Space Telescope, Extreme Ultraviolet Explorer, ROSAT, ASCA, and BeppoSAX.
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THE CHANDRA COSMOS-LEGACY SURVEY: THE z > 3 SAMPLE
S. Marchesi,S. Marchesi,S. Marchesi,Francesca Civano,Francesca Civano,Mara Salvato,Francesco Shankar,Andrea Comastri,Martin Elvis,Giorgio Lanzuisi,Giorgio Lanzuisi,Benny Trakhtenbrot,Cristian Vignali,Cristian Vignali,G. Zamorani,Viola Allevato,Marcella Brusa,Marcella Brusa,Fabrizio Fiore,Roberto Gilli,Richard E. Griffiths,Günther Hasinger,Takamitsu Miyaji,Kevin Schawinski,Ezequiel Treister,Ezequiel Treister,C. M. Urry +26 more
TL;DR: In this paper, the authors presented the largest high-redshift (3 0 at z > 3) AGN count in the observed 0.5-2 keV band, finding a decline in the number of sources at z ≥ 3 and constraining phenomenological models of the X-ray background.
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The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
TL;DR: In this paper, a detailed and self-consistent modeling of the cosmic X-ray background (XRB) based on the most up-to-date Xray luminosity functions (XLF) and evolution of Active Galactic Nuclei (AGN) is presented.