361 citations · 8.4k across the 127 of their papers we have counts for
16 papers · 1 filter
Swift BAT, Fermi LAT, and the Blazar Sequence
R. M. Sambruna, D. Donato, M. Ajello +2
Using public \fermi LAT and \swift BAT observations, we constructed the first sample of blazars selected at both hard X-rays and gamma-rays. Studying its spectral properties, we fi…
Radio-Loud Narrow-Line Seyfert 1 as a New Class of Gamma-Ray AGN
LAT Collaboration, G. Ghisellini, L. Maraschi +1
We report the discovery with Fermi/LAT of gamma-ray emission from three radio-loud narrow-line Seyfert 1 galaxies: PKS 1502+036 (z=0.409), 1H 0323+342 (z=0.061) and PKS 2004-447 (z…
Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
The Fermi LAT Collaboration, A. A. Abdo, D. E. Harris +2
We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consistent with the center of the radio galaxy M87, at a source significance of over 10 s…
Polarimetry and the High-Energy Emission Mechanisms in Quasar Jets
M. Cara, E. S. Perlman, Y. Uchiyama +15
The emission mechanisms in extragalactic jets include synchrotron and various inverse-Compton processes. At low (radio through infrared) energies, it is widely agreed that synchrot…
Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line Seyfert 1 quasar PMN J0948+0022
L. Foschini, G. Ghisellini, L. Maraschi +2
We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope of high-energy gamma-ray emission from the peculiar quasar PMN J0948+0022 (z=0…
Chandra detection of a parsec scale wind in the Broad Line Radio Galaxy 3C 382
J. N. Reeves, R. M. Sambruna, V. Braito +1
We present unambiguous evidence for a parsec scale wind in the Broad-Line Radio Galaxy (BLRG) 3C 382, the first radio-loud AGN, with $R_{\rm L} = \log_{10}(f_{\rm 5GHz}/f_{4400})>1…
Short-term variability and PSD analysis of the radio-loud AGN 3C 390.3
M. Gliozzi, I. E. Papadakis, M. Eracleous +4
We investigate the short-term variability properties and the power spectral density (PSD) of the Broad-Line Radio Galaxy (BLRG) 3C 390.3 using observations made by XMM, RXTE, and S…
Structure of the Accretion Flow in Broad-Line Radio Galaxies: The Case of 3C390.3
R. M. Sambruna, J. N. Reeves, V. Braito +8
We present XMM and Suzaku observations of the Broad-Line Radio Galaxy (BLRG) 3C390.3. The Fe Ka line has a width FWHM ~ 8,800 km/s, consistent within a factor two with the width of…
Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line quasar PMN J0948+0022
LAT Collaboration, A. A. Abdo, G. Ghisellini +3
We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope of high-energy gamma-ray emission from the peculiar quasar PMN J0948+0022 (z=0…
The Evolution of Swift/BAT blazars and the origin of the MeV background
M. Ajello, L. Costamante, R. M. Sambruna +8
We use 3 years of data from the Swift/BAT survey to select a complete sample of X-ray blazars above 15 keV. This sample comprises 26 Flat-Spectrum Radio Quasars (FSRQs) and 12 BL L…
Early Fermi Gamma-ray Space Telescope Observations of the Quasar 3C 454.3
LAT Collaboration, A. A. Abdo
This is the first report of Fermi Gamma-ray Space Telescope observations of the quasar 3C 454.3, which has been undergoing pronounced long-term outbursts since 2000. The data from…
Fermi Discovery of Gamma-Ray Emission from NGC 1275
LAT Collaboration, A. A. Abdo, H. D. Aller +6
We report the discovery of high-energy (E>100 MeV) gamma-ray emission from NGC 1275, a giant elliptical galaxy lying at the center of the Perseus cluster of galaxies, based on obse…
Fermi/LAT discovery of gamma-ray emission from the flat-spectrum radio quasar PKS 1454-354
LAT Collaboration, A. A. Abdo, P. G. Edwards +4
We report the discovery by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope of high-energy gamma-ray (GeV) emission from the flat-spectrum radio quasar PK…
The 22-Month Swift-BAT All-Sky Hard X-ray Survey
J. Tueller, W. H. Baumgartner, C. B. Markwardt +36
We present the catalog of sources detected in the first 22 months of data from the hard X-ray survey (14--195 keV) conducted with the BAT coded mask imager on the \swift satellite.…
The changing look of PKS 2149-306
V. Bianchin, L. Foschini, G. Ghisellini +8
Aims: We study the blazar nature of the high-redshift Flat-Spectrum Radio Quasar PKS 2149-306 (z = 2.345) by investigating its long-term behavior. Methods: We analyzed all publicly…
Blazar nuclei in radio-loud narrow-line Seyfert 1?
L. Foschini, L. Maraschi, F. Tavecchio +3
It has been suggested that some radio-loud narrow-line Seyfert 1 contain relativistic jets, on the basis of their flat-spectrum radio nuclei and studies on variability. We present…