Browsing by Author "Civano, Francesca"
Now showing 1 - 19 of 19
Results Per Page
Sort Options
- ItemFinding rare AGN: X-ray number counts of Chandra sources in Stripe 82.(2013) LaMassa, Stephanie M.; Treister, Ezequiel; Urry, C. Meg; Glikman, Eilat; Cappelluti, N.; Civano, Francesca; Comastri, A.; Böhringer, Hans; Cardamone, Carie; Chon, Gayoung; Kephart, Miranda
- ItemFinding rare AGN: XMM-Newton and Chandra observations of SDSS Stripe 82.(2013) LaMassa, Stephanie M.; Treister, Ezequiel; Urry, C. Meg; Cappelluti N; Civano, Francesca; Ranalli, Piero; Glikman, Eilat; Richards, Gordon; Ballantyne, David; Stern, Daniel.; Comastri, A.
- ItemOn R-W1 as A Diagnostic to Discover Obscured Active Galactic Nuclei in Wide-area X-Ray Surveys.(2016) LaMassa, Stephanie M.; Treister, Ezequiel; Civano, Francesca; Brusa, Marcella; Stern, Daniel; Glikman, Eilat; Gallagher, Sarah; Urry, C. Meg
- ItemPeering Through the Dust: NuSTAR Observations of Two FIRST-2MASS Red Quasars(2016) LaMassa, Stephanie M.; Treister, Ezequiel; Ricarte, Angelo; Glikman, Eilat; Urry, C. Megan; Stern, Daniel.; Yaqoob, Tahir; Lansbury, George B.; Civano, Francesca; Boggs, Steve E.; Brandt, W N.
- ItemThe Accretion History of AGN: The Spectral Energy Distributions of X-Ray-luminous Active Galactic Nuclei(2023) Auge, Connor; Sanders, David; Treister, Ezequiel; Urry, C. Megan; Kirkpatrick, Allison; Cappelluti, Nico; Ananna, Tonima Tasnim; Boquien, Médéric; Baloković, Mislav; Civano, Francesca; Coleman, Brandon; Ghosh, Aritra; Kartaltepe, Jeyhan; Koss, Michael; LaMassa, Stephanie; Marchesi, Stefano; Peca, Alessandro; Powell, Meredith; Trakhtenbrot, Benny; Turner, Tracey JaneSpectral energy distributions (SEDs) from X-ray to far-infrared (FIR) wavelengths are presented for a sample of 1246 X-ray-luminous active galactic nuclei (AGNs; L0.5–10 keV > 1043 erg s−1), with zspec < 1.2, selected from Stripe 82X, COSMOS, and GOODS-N/S. The rest-frame SEDs show a wide spread (∼2.5 dex) in the relative strengths of broad continuum features at X-ray, ultraviolet (UV), mid-infrared (MIR), and FIR wavelengths. A linear correlation (log–log slope of 0.7 ± 0.04) is found between LMIR and LX. There is significant scatter in the relation between the LUV and LX owing to heavy obscuration; however, the most luminous and unobscured AGNs show a linear correlation (log–log slope of 0.8 ± 0.06) in the relation above this scatter. The relation between LFIR and LX is predominantly flat, but with decreasing dispersion at LX > 1044 erg s−1. The ratio between the "galaxy-subtracted" bolometric luminosity and the intrinsic LX increases from a factor of ∼10 to 70 from log Lbol/(erg s−1) = 44.5 to 46.5. Characteristic SED shapes have been determined by grouping AGNs based on relative strengths of the UV and MIR emission. The average L1μm is constant for the majority of these SED shapes, while AGNs with the strongest UV and MIR emission have elevated L1μm, consistent with the AGN emission dominating their SEDs at optical and near-infrared wavelengths. A strong correlation is found between the SED shape and both the LX and Lbol, such that Lbol/LX = 20.4 ± 1.8, independent of the SED shape. This is consistent with an evolutionary scenario of increasing Lbol with decreasing obscuration as the AGN blows away circumnuclear gas.
- ItemThe Accretion History of AGNs. I. Supermassive Black Hole Population Synthesis Model(2019) Ananna, Tonima; Treister, Ezequiel; Urry, C. Megan; Ricci, Claudio; Kirkpatrick, Allison; LaMassa, Stephanie M.; Buchner, Johannes; Civano, Francesca; Tremmel, Michael; Marchesi, Stefano
- ItemThe bolometric output and host-galaxy properties of obscured AGN in the XMM-COSMOS survey.(2011) Lusso, E.; Treister, Ezequiel; Comastri, A.; Vignali, C.; Zamorani, G.; Sanders, David B.; Bolzonella, M.; Bongiorno, A.; Brusa, Marcella; Civano, Francesca; Gilli, R.
- ItemThe Chandra COSMOS Legacy Survey: Energy Spectrum of the Cosmic X-Ray Background and Constraints on Undetected Populations(2017) Cappelluti N; Treister, Ezequiel; Li, Yanxia; Ricarte, Angelo; Agarwal, Bhaskar; Allevato, Viola; Ananna, Tonima; Ajello, Marco; Civano, Francesca; Comastri, A.; Elvis, Martin
- ItemThe Chandra COSMOS Legacy survey: optical/IR identifications(2016) Marchesi, Stefano; Treister, Ezequiel; Civano, Francesca; Elvis, Martin; Salvato, M.; Brusa, Marcella; Comastri, A.; Gilli, R.; Hasinger, G.; Lanzuisi, G.; Miyaji, T.; Urry, C. Megan
- ItemThe Chandra Cosmos Legacy Survey: Overview and Point Source Catalog(2016) Civano, Francesca; Treister, Ezequiel; Marchesi, Stefano; Comastri, A.; Urry, C. Megan; Elvis, Martin; Cappelluti N; Puccetti, S.; Brusa, Marcella; Zamorani, G.; Hasinger, G.
- ItemThe Chandra COSMOS-Legacy Survey: Source X-Ray Spectral Properties(2016) Marchesi, Stefano; Treister, Ezequiel; Lanzuisi, G.; Civano, Francesca; Iwasawa, K.; Suh, H.; Comastri, A.; Zamorani, G.; Allevato, Viola; Griffiths, R.; Miyaji, T.
- ItemThe Chandra COSMOS-Legacy Survey: The z>3 Sample(2016) Marchesi, Stefano; Treister, Ezequiel; Civano, Francesca; Salvato, M.; Shankar, F.; Comastri, A.; Elvis, Martin; Lanzuisi, G.; Trakhtenbrot, Benny; Vignali, C.; Zamorani, G.; Allevato, Viola
- ItemThe NuSTAR Extragalactic Survey: Average Broadband X-Ray Spectral Properties of the NuSTAR-detected AGNs(2017) Del Moro, A.; Bauer, Franz Erik; Treister, Ezequiel; Ricci, Claudio; Alexander, D. M.; Aird, J. A.; Civano, Francesca; Mullaney, J.; Ballantyne, D. R.; Brandt, W N.; Comastri, A.
- ItemThe NuSTAR Extragalactic Surveys: Initial Results and Catalog from the Extended Chandra Deep Field South(2015) Mullaney, J.; Bauer, Franz Erik; Treister, Ezequiel; Del Moro, A.; Aird, J. A.; Alexander, D. M.; Civano, Francesca; Hickox, R. C.; Lansbury, George B.; Ajello, Marco; Assef, R.
- ItemThe Nustar Extragalactic Surveys: Overview and Catalog from the COSMOS Field(2015) Civano, Francesca; Bauer, Franz Erik; Luo, B.; Saez, C.; Treister, Ezequiel; Hickox, R. C.; Puccetti, S.; Comastri, A.; Mullaney, J.; Zappacosta, L.; LaMassa, Stephanie M.
- ItemThe NuSTAR Extragalactic Surveys: Source Catalog and the Compton-thick Fraction in the UDS Field.(2018) Masini, A.; Treister, Ezequiel; Civano, Francesca; Comastri, A.; Fornasini, F.; Ballantyne, D. R.; Lansbury, George B.; Alexander, D. M.; Boorman, P.G.; Brandt, W N.
- ItemThe NuSTAR Extragalactic Surveys: The Number Counts of Active Galactic Nuclei and the Resolved Fraction of the Cosmic X-Ray Background(2016) Harrison, F. A.; Bauer, Franz Erik; Treister, Ezequiel; Aird, J. A.; Civano, Francesca; Lansbury, George B.; Mullaney, J.; Ballantyne, D. R.; Alexander, D. M.; Stern, Daniel.; Ajello, Marco
- ItemThe NuSTAR Extragalactic Surveys: X-Ray Spectroscopic Analysis of the Bright Hard-band Selected Sample(2018) Zappacosta, L.; Ricci, Claudio; Treister, Ezequiel; Comastri, A.; Civano, Francesca; Puccetti, S.; Fiore, F.; Aird, J. A.; Del Moro, A.; Lansbury, George B.; Lanzuisi, G.
- ItemThe XMM-Newton Wide-field Survey in the Cosmos Field (XMM-COSMOS): Demography and Multiwavelength Properties of Obscured and Unobscured Luminous Active Galactic Nuclei(2010) Brusa, Marcella; Treister, Ezequiel; Civano, Francesca; Comastri, A.; Miyaji, T.; Salvato, M.; Zamorani, G.; Cappelluti, N; Fiore, F.; Hasinger, G.; Mainieri, V.