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Browsing by Author "La Franca, Fabio"

Browsing by Author "La Franca, Fabio"

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  • Constraining the UV emissivity of AGN throughout cosmic time via X-ray surveys 
    Ricci, Federica; Marchesi, Stefano; Shankar, Francesco; La Franca, Fabio; Civano, Francesca (2017)
    The cosmological process of hydrogen (H I) reionization in the intergalactic medium is thought to be driven by UV photons emitted by star-forming galaxies and ionizing active galactic nuclei (AGN). The contribution of ...
  • Optical Spectroscopic Observations of Gamma-ray Blazar Candidates. XI. Optical Observations from SOAR, Blanco, NTT and OAN-SPM. The Story So Far 
    Peña-Herazo, Harold A.; Paggi, Alessandro; García-Pérez, Abigail; Amaya-Almazán, Raúl A.; Massaro, Francesco; Ricci, Federica; Chavushyan, Vahram; Marchesini, Ezequiel J.; Masetti, Nicola; Landoni, Marco; D'Abrusco, Raffaele; Milisavljevic, Dan; Jiménez-Bailón, Elena; Patiño-Álvarez, Víctor M.; La Franca, Fabio; Smith, Howard A.; Tosti, Gino (2021)
    Blazars represent about 62% of the sources in the ?-ray Fermi-LAT catalog, and about 80% of the ?-ray sources associated with a lower-energy counterpart, dominating the ?-ray sky. In particular, about 42% of the ?-ray ...
  • Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. XII. Follow-up Observations from SOAR, Blanco, NTT, and OAN-SPM 
    García-Pérez, Abigail; Peña-Herazo, Harold A.; Massaro, Francesco; Chavushyan, Vahram; D'Abrusco, Raffaele; Masetti, Nicola; Landoni, Marco; La Franca, Fabio; Patiño-Álvarez, Víctor M.; Amaya-Almazán, Raúl A.; Milisavljevic, Dan; Paggi, Alessandro; Ricci, Federica; Jiménez-Bailón, Elena; Smith, Howard A. (2023)
    Roughly one third of the sources in the Fermi-LAT catalogs are listed as unidentified/unassociated ?-ray sources (UGS), i.e., they lack a low-energy counterpart. In addition, there is a growing population of blazars of ...
  • Probing black hole accretion tracks, scaling relations, and radiative efficiencies from stacked X-ray active galactic nuclei 
    Shankar, Francesco; Weinberg, David H.; Marsden, Christopher; Grylls, Philip J.; Bernardi, Mariangela; Yang, Guang; Moster, Benjamin; Fu, Hao; Carraro, Rosamaria; Alexander, David M.; Allevato, Viola; Ananna, Tonima T.; Bongiorno, Angela; Calderone, Giorgio; Civano, Francesca; Daddi, Emanuele; Delvecchio, Ivan; Duras, Federica; La Franca, Fabio; Lapi, Andrea; Lu, Youjun; Menci, Nicola; Mezcua, Mar; Ricci, Federica; Rodighiero, Giulia; Sheth, Ravi K.; Suh, Hyewon; Villforth, Carolin; Zanisi, Lorenzo (2020)
    The masses of supermassive black holes at the centres of local galaxies appear to be tightly correlated with the mass and velocity dispersions of their galactic hosts. However, the local M<SUB>bh</SUB>-M<SUB>star</SUB> ...
  • Two New Catalogs of Blazar Candidates in the WISE Infrared Sky 
    D'Abrusco, Raffaele; Álvarez Crespo, Nuria; Massaro, Francesco; Campana, Riccardo; Chavushyan, Vahram; Landoni, Marco; La Franca, Fabio; Masetti, Nicola; Milisavljevic, Dan; Paggi, Alessandro; Ricci, Federica; Smith, Howard A. (2019)
    We present two catalogs of radio-loud candidate blazars whose Wide-Field Infrared Survey Explorer (WISE) mid-infrared colors are selected to be consistent with the colors of confirmed ?-ray-emitting blazars. The first ...

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