The Nature of Optically Dull Active Galactic Nuclei in COSMOS (2009)
Trump, Jonathan R., Impey, Chris D., Taniguchi, Yoshi, Brusa, Marcella, Civano, Francesca, Elvis, Martin, ...
We present infrared, optical, and X-ray data of 48 X-ray bright, optically dull active galactic nuclei (AGNs) in the COSMOS field. These objects exhibit the X-ray luminosity of an AGN but lack broad...
The Nature of Optically Dull Active Galactic Nuclei in COSMOS (2009)
Trump, Jonathan R., Impey, Chris D., Taniguchi, Yoshi, Brusa, Marcella, Civano, Francesca, Elvis, Martin, ...
We present infrared, optical, and X-ray data of 48 X-ray bright, optically dull AGNs in the COSMOS field. These objects exhibit the X-ray luminosity of an active galactic nucleus (AGN) but lack broad...
The Chandra COSMOS Survey. I. Overview and Point Source Catalog (2009)
Elvis, Martin, Civano, Francesca, Vignali, Cristian, Puccetti, Simonetta, Fiore, Fabrizio, Cappelluti, Nico, ...
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.5 deg^2 of the COSMOS field (centered at 10 ^h , +02 ^o ) with an effective exposure of ~160 ks,...
Jahnke, Knud, Bongiorno, Angela, Brusa, Marcella, Capak, Peter, Cappelluti, Nico, Cisternas, Mauricio, ...
We constrain the ratio of black hole (BH) mass to total stellar mass of type-1 AGN in the COSMOS survey at 1
Observational limits on type 1 active galactic nucleus rate in COSMOS (2009)
Trump, Jonathan R., Impey, Chris D., Kelly, Brandon C., Elvis, Martin, Merloni, A., Bongiorno, Angela, ...
We present black hole masses and accretion rates for 182 Type 1 active galactic nuclei (AGNs) in COSMOS. We estimate masses using the scaling relations for the broad H β, Mg ii, and C iv emission...
The COSMOS Active Galactic Nucleus Spectroscopic Survey. I. XMM-Newton Counterparts (2009)
Trump, Jonathan R., Impey, Chris D., Elvis, Martin, McCarthy, Patrick J., Huchra, John P., Brusa, Marcella, ...
We present optical spectroscopy for an X-ray and optical flux-limited sample of 677 XMM-Newton selected targets covering the 2 deg^2 Cosmic Evolution Survey field, with a yield of 485 high-confidence...
Observational Limits on Type 1 AGN Accretion Rate in COSMOS (2009)
Trump, Jonathan R., Impey, Chris D., Kelly, Brandon C., Elvis, Martin, Merloni, Andrea, Bongiorno, Angela, ...
We present black hole masses and accretion rates for 182 Type 1 AGN in COSMOS. We estimate masses using the scaling relations for the broad Hb, MgII, and CIV emission lines in the redshift ranges 0.16
The Chandra COSMOS Survey, I: Overview and Point Source Catalog (2009)
Elvis, Martin, Civano, Francesca, Vignali, Cristian, Puccetti, Simonetta, Fiore, Fabrizio, Cappelluti, Nico, ...
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra} program that has imaged the central 0.5 sq.deg of the COSMOS field (centered at 10h, +02deg) with an effective exposure of ~160ksec,...
The COSMOS active galactic nucleus spectroscopic survey - I. XMM-Newton counterparts (2009)
Trump, Jonathan R., Impey, Chris D., Elvis, Martin, McCarthy, Patrick J., Huchra, John P., Brusa, Marcella, ...
Observational limits on type 1 active galactic nucleus accretion rate in COSMOS (2009)
Trump, Jonathan R., Impey, Chris D., Kelly, Brandon C., Elvis, Martin, Merloni, Andrea, Bongiorno, Angela, ...
The Chandra COSMOS survey - I. Overview and point source catalog (2009)
Elvis, Martin, Civano, Francesca, Vignali, Christian, Puccetti, Simonetta, Fiore, Fabrizio, Cappelluti, Nico, ...
The COSMOS AGN Spectroscopic Survey I: XMM Counterparts (2008)
Trump, Jonathan R., Impey, Chris D., Elvis, Martin, McCarthy, Patrick J., Huchra, John P., Brusa, Marcella, ...
We present optical spectroscopy for an X-ray and optical flux-limited sample of 677 XMM-Newton selected targets covering the 2 deg^2 COSMOS field, with a yield of 485 high-confidence redshifts. The...
Properties of the molecular gas in a starbursting QSO at z=1.83 in the COSMOS field (2008)
Aravena, Manuel, Bertoldi, Frank, Schinnerer, Eva, Weiss, Axel, Jahnke, Knud, Carilli, Chris L., ...
Using the IRAM 30m telescope, we have detected the CO J=2-1, 4-3, 5-4, and 6-5 emission lines in the millimeter-bright, blank-field selected AGN COSMOS J100038+020822 at redshift z=1.8275. The...
Discovery of an evolved galaxy cluster at z > 2 (2008)
Onodera, Masato, Daddi, Emanuele, Kong, Xu, Arimoto, Nobuo, Renzini, Alvio, Brusa, Marcella, ...
Extragalactic Surveys: AGN physics and evolution (2007)
Comastri, Andrea, Brusa, Marcella
We review the most important findings on AGN physics and cosmological evolution as obtained by extragalactic X-ray surveys and associated multiwavelength observations. We briefly discuss the...
A survey of AGN and supermassive black holes in the COSMOS survey (2007)
Impey, Chris D., Trump, Jon R., McCarthy, Pat J., Elvis, Martin, Huchra, John P., Scoville, Nick Z., ...
Miyaji, Takamitsu, Zamorani, Giovanni, Cappelluti, Nico, Gilli, Roberto, Griffiths, Richard E., Comastri, Andrea, ...
Magellan spectroscopy of AGN candidates in the COSMOS field (2007)
Trump, Jonathan R., Impey, Chris D., McCarthy, Patrick J., Elvis, Martin, Huchra, John P., Brusa, Marcella, ...
A multiwavelength study of AGN with COSMOS: Do low-Eddington ratio type 1 AGN exist? (2007)
Trump, Jonathan R., Impey, Chris D., Gabor, Jared M., McCarthy, Patrick J., Elvis, Martin, Huchra, John, ...
The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view (2007)
Vignali, Cristian, Pozzi, Francesca, Comastri, Andrea, Pozzetti, Lucia, Mignoli, Marco, Gruppioni, Carlotta, ...
Magellan spectroscopy of AGN candidates in the COSMOS field (2007)
Trump, Jonathan R., Impey, Chris D., McCarthy, Patrick J., Elvis, Martin, Huchra, John P., Brusa, Marcella, ...
We present spectroscopic redshifts for the first 466 X-ray- and radio-selected AGN targets in the 2 deg2 COSMOS field. Spectra were obtained with the IMACS instrument on the Magellan (Baade)...
A survey of AGN and supermassive black holes in the COSMOS survey (2007)
Impey, Chris D., Trump, Jon R., McCarthy, Pat J., Elvis, Martin, Huchra, John P., Scoville, Nick Z., ...
Not Available
Miyaji, Takamitsu, Zamorani, Giovanni, Cappelluti, Nico, Gilli, Roberto, Griffiths, Richard E., Comastri, Andrea, ...
We present the first results of the measurements of angular auto-correlation functions (ACFs) of X-ray point sources detected in the XMM-Newton observations of the 2 deg2 COSMOS field (XMM-COSMOS). A...
Magellan Spectroscopy of AGN Candidates in the COSMOS Field (2006)
Trump, Jonathan R., Impey, Chris D., McCarthy, Patrick J., Elvis, Martin, Huchra, John P., Brusa, Marcella, ...
We present spectroscopic redshifts for the first 466 X-ray and radio-selected AGN targets in the 2 deg^2 COSMOS field. Spectra were obtained with the IMACS instrument on the Magellan (Baade)...
Relativistic Iron lines at high redshifts (2006)
Comastri, Andrea, Brusa, Marcella, Gilli, Roberto
The shape and the intensity of the 6.4 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...
The Iron Line Background (2005)
Brusa, Marcella, Gilli, Roberto, Comastri, Andrea
We investigate the presence of iron line emission among faint X-ray sources identified in the 1Ms Chandra Deep Field South and in the 2Ms Chandra Deep Field North. Individual source spectra are...
X-ray spectral analysis of optically faint sources in the Chandra Deep Fields (2005)
Civano, Francesca, Comastri, Andrea, Brusa, Marcella
We present the results of a detailed spectral analysis of optically faint hard X-ray sources in the Chandra deep fields selected on the basis of their high X-ray to optical flux ratio (X/O). The...
Physics and evolution of obscured X-ray sources: a multiwavelength approach (2004)
Observations at high energies yield important information on the structure and nature of AGN; when coupled with deep optical and near-infrared (photometric and spectroscopic) follow-up, they provide...
Are QSO2 hiding among EROs? (2004)
We present the results of a deep (80 ks) XMM-Newton survey of one of the largest sample of near-infrared selected Extremely Red Objects (R-K>5) available to date (~300 objects, Daddi et al. 2000)....
A broad iron K alpha line at z=1.146 (2004)
Comastri, Andrea, Brusa, Marcella, Civano, Francesca
We report the discovery of a strong iron K alpha line in the hard X-ray selected source CXOJ 123716.7+621733 in the Chandra Deep Field North survey at z=1.146. The analysis is made possible by the...
Hard X-ray observations of Extremely Red Objects (2002)
Extremely Red Objects (EROs, R-K>5) constitute a heterogenous class of extragalactic sources including high redshift elliptical galaxies, dusty star-forming systems and heavily obscured AGNs. Hard...