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
More filters
Journal Article
The blazar PKS 0528+134: new results from BeppoSAX observations
G. Ghisellini,Luigi Costamante,G. Tagliaferri,L. Maraschi,Annalisa Celotti,Giovanni Fossati,Elena Pian,Andrea Comastri,G. de Francesco,L. Lanteri,C. M. Raiteri,G. Sobrito,M. Villata,Ian S. Glass,Paola Grandi,C. Perola,Aldo Treves +16 more
TL;DR: In this paper, a power law was used to fit the spectrum of the bright blazar PKS 0528+134 with a power index X = 0 :49 0:07 between 0.1 and 10 keV.
Journal ArticleDOI
Suzaku observations of hard X-ray selected Seyfert 2 galaxies
Andrea Comastri,K. Iwasawa,Roberto Gilli,Cristian Vignali,Piero Ranalli,Giorgio Matt,Fabrizio Fiore +6 more
TL;DR: In this article, the authors present a characterization of the broad-band X-ray spectrum of the Seyfert 2 galaxies using the pin Hard X-Ray Detector up to several tens of keV.
Journal ArticleDOI
The NuSTAR Extragalactic Surveys: Unveiling Rare, Buried AGNs and Detecting the Contributors to the Peak of the Cosmic X-Ray Background
Alberto Masini,Alberto Masini,Alberto Masini,Andrea Comastri,Francesca Civano,Ryan C. Hickox,Christopher M. Carroll,Hyewon Suh,W. N. Brandt,Michael A. DiPompeo,Fiona A. Harrison,Daniel Stern +11 more
TL;DR: In this paper, the results of active galactic nuclei (AGNs) detection by NuSTAR performed in three extragalactic survey fields (COSMOS, UDS, and Extended Chandra Deep Field-South (ECDFS)) in three hard bands, namely H1 (8-16 keV), H2 (16-24 keV) and VH (35-55 keV).
Journal ArticleDOI
Inferring Compton-thick AGN candidates at z > 2 with Chandra using the >8 keV rest-frame spectral curvature
L. Baronchelli,Michael Koss,Kevin Schawinski,C. Cardamone,F. Civano,F. Civano,Andrea Comastri,Martin Elvis,Giorgio Lanzuisi,Giorgio Lanzuisi,Stefano Marchesi,Stefano Marchesi,Claudio Ricci,Claudio Ricci,Mara Salvato,Benny Trakhtenbrot,Ezequiel Treister +16 more
TL;DR: In this article, the Spectral Curvature (SC) method was applied to high-redshift active galactic nuclei (AGN) to find Compton-thick (CT) AGN.
Journal Article
A search for variability in narrow line seyfert 1 galaxies. ii. new data from the loiano monitoring programme
TL;DR: In this paper, the authors present part of the results from a spectroscopic monitoring programme on a sample of AGNs, relative to Nar- rowLineSeyfert1Galaxies: following the idea at Balmer-line variability can help discriminate among the possible models for these objects, and on the basis of a rst monitoring project with longtime-scales,wenowaddtothe previousdatabasenewvari- ability results, both on short and long time scales.