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.
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Ultra-deep catalog of X-ray groups in the ECDF-S
A. Finoguenov,Masaomi Tanaka,Michael C. Cooper,Viola Allevato,Nico Cappelluti,Ami Choi,Catherine Heymans,Franz E. Bauer,F. Ziparo,Piero Ranalli,John D. Silverman,W. N. Brandt,Yongquan Xue,John S. Mulchaey,L. M. Howes,Christian Schmid,D. Wilman,Andrea Comastri,G. Hasinger,Vincenzo Mainieri,B. Luo,Paolo Tozzi,Piero Rosati,Peter Capak,Paola Popesso +24 more
TL;DR: In this paper, a catalog of 46 spectroscopically identified groups, reaching a redshift of 1.6, was presented, with the search for the extended emission on spatial scales of 32$^{\prime\prime}$ in both Chandra and XMM data, covering 0.3 square degrees.
Journal ArticleDOI
The NH distribution of Seyfert 2 galaxies and the X-ray background
Roberto Maiolino,Loredana Bassani,Andrea Comastri,M. Dadina,R. Della Ceca,Roberto Gilli,Giorgio Matt,Guido Risaliti,M. Salvati,G. Zamorani +9 more
TL;DR: In this paper, the authors presented the results of a hard X-ray survey of weak Sy2 galaxies, performed by means of BeppoSAX, aimed at reducing these biases.
Journal ArticleDOI
Hot-Dust-Poor Type 1 Active Galactic Nuclei in the COSMOS Survey
Heng Hao,Martin Elvis,Francesca Civano,Giorgio Lanzuisi,Giorgio Lanzuisi,Marcella Brusa,Elisabeta Lusso,G. Zamorani,Andrea Comastri,Angela Bongiorno,Chris Impey,Anton M. Koekemoer,Emeric Le Floc'h,Mara Salvato,David B. Sanders,Jonathan R. Trump,Cristian Vignali +16 more
TL;DR: In this paper, a large class of type 1 AGNs with unusually weak near-infrared (1-3m) emission in the XMM-COSMOS type 1 active galactic nuclei was reported.
Book ChapterDOI
Relativistic Iron Lines at High Redshifts
TL;DR: The shape and intensity of the 64 keV iron line bring unique information on the geometrical and physical properties of the supermassive black hole and the surrounding accreting gas at the very center of Active Galactic Nuclei as mentioned in this paper.
Journal ArticleDOI
NuSTAR J033202-2746.8: direct constraints on the Compton reflection in a heavily obscured quasar at z~2
A. Del Moro,James Mullaney,James Mullaney,David M. Alexander,Andrea Comastri,Franz E. Bauer,Franz E. Bauer,Ezequiel Treister,Daniel Stern,Francesca Civano,Francesca Civano,Piero Ranalli,Cristian Vignali,Cristian Vignali,James Aird,David R. Ballantyne,Mislav Baloković,S. E. Boggs,W. N. Brandt,Finn Erland Christensen,William W. Craig,Poshak Gandhi,Roberto Gilli,C. J. Hailey,Fiona A. Harrison,Ryan C. Hickox,Stephanie M. LaMassa,George B. Lansbury,Birong Luo,Simonetta Puccetti,Meg Urry,William W. Zhang +31 more
TL;DR: NuSTAR observations of NuSTAR J033202-2746.8, a radio-loud quasar detected in the Extended Chandra Deep Field-South, the deepest layer of the NuSTAR extragalactic survey (~400 ks, at its deepest) are reported in this paper.