GeV emission from the nearby radio galaxy Centaurus A

Abstract

EGRET has detected 67 sources associated with active galactic nuclei. With the exception of radio galaxy Cen A, all are classified as belonging to the blazar class of active galactic nuclei. The cumulative exposure from multiple EGRET observations has provided the first clear detection of Centaurus A. Unlike the \gr blazars seen by EGRET which are believed to exhibit near-alignment of the central jet along the line-of-sight, Cen A provides the first evidence for $>$100 MeV emission from a source with a confirmed large-inclination jet. Although the high-energy emission represents a lower luminosity than most EGRET blazars, with the advent of new more sensitive instruments such as GLAST and VERITAS, the detection of off-axis high-energy emission from more distant radio galaxies is an exciting possibility.

4 pages. accepted for publication in Astroparticle Physics

References in corpus (3)

• EGRET Observations of the Extragalactic Gamma Ray Emission
• Evidence for a 20pc disk at the nucleus of Centaurus A
• TeV observations of Centaurus A

Cited by in corpus (59)

• Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey
• High-energy Neutrino Astronomy: The Cosmic Ray Connection
• Discovery of very high energy gamma-ray emission from Centaurus A with H.E.S.S
• Fermi Discovery of Gamma-Ray Emission from NGC 1275
• Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
• Fermi Large Area Telescope Observations of Misaligned AGN
• Fermi Large Area Telescope View of the Core of the Radio Galaxy Centaurus A
• Ultra-High-Energy Cosmic Rays
• Astrophysical Origins of Ultrahigh Energy Cosmic Rays
• High-energy Particle Acceleration and Production of Ultra-high-energy Cosmic Rays in the Giant Lobes of Centaurus A
• Ultrahigh Energy Cosmic Rays: The state of the art before the Auger Observatory
• Ultra High Energy Cosmic Rays from Black Hole Jets of Radio Galaxies
• Global Physical Conditions of the Interstellar Medium in Nearby Galaxies
• High Energy gamma-rays From FR I Jets
• Gamma ray astrophysics: the EGRET results
• A lepto-hadronic model for high-energy emission from FR I radiogalaxies
• Is the core of M87 the source of its TeV emission? Implications for unified schemes
• Observations of Selected AGN with H.E.S.S
• The Extragalactic Gamma-ray Sky in the Fermi era
• High Energy Neutrinos from the TeV Blazar 1ES 1959+650
• Ultra-high energy Neutrinos from Centaurus A and the Auger hot spot
• Is the EGRET source 3EG J1621+8203 the radio galaxy NGC 6251?
• The Hard X-ray Emission of Cen A
• The $\gamma$-ray spectrum of the core of Centaurus A as observed with H.E.S.S. and Fermi-LAT
• Fermi Gamma-ray Space Telescope: High-Energy Results from the First Year
• Neutrino Bursts from Fanaroff-Riley I Radio Galaxies
• Hadronic-Origin TeV gamma-Rays and Ultra-High Energy Cosmic Rays from Centaurus A
• An Auger test of the Cen A model of highest energy cosmic rays
• The Trails of Superluminal Jet Components in 3C111
• Suzaku view of X-ray Spectral Variability of the Radio Galaxy Centaurus A : Partial Covering Absorber, Reflector, and Possible Jet Component
• VHE Gamma-Ray Induced Pair Cascades in the Radiation Fields of Dust Tori of AGN: Application to Cen A
• Are Cen a and M87 Tev Gamma-Ray Sources?
• Discovery of a new extragalactic source population of energetic particles
• Gamma-ray fluxes from the core emission of Centaurus A: A puzzle solved
• Neutrino, $\gamma$-ray and cosmic ray fluxes from the core of the closest radio galaxies
• Discovery of a new radio galaxy within the error box of the unidentified gamma-ray source 3EG J1735-1500
• A Two Zone Synchrotron Model for the Knots in the M87 Jet
• GLAST: Understanding the High Energy Gamma-Ray Sky
• Gamma-Ray Emission from the Broad-Line Radio Galaxy 3C111
• Unraveling the Nature of Unidentified High Galactic Latitude Fermi/LAT Gamma-ray Sources with Suzaku
• TeV J2032+4130: a not-so-dark Accelerator?
• Update on tests of the Cen A neutron-emission model of highest energy cosmic rays
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• Gamma-rays from the IC $e^{\pm }$ pair cascade in the radiation field of an accretion disk: Application to CenA
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• Internal gamma gamma-opacity in Active Galactic Nuclei and the consequences for the TeV observations of M87 and Cen A
• Study of the PeV Neutrino, $\gamma$-rays and UHECRs around The Lobes of Centaurus A
• Investigating the EGRET-radio galaxies link with INTEGRAL: the case of 3EG J1621+8203 and NGC 6251
• The hard X-ray view of the low-luminosity blazar in the radio galaxy NGC6251
• TeV observations of Centaurus A
• Gamma Rays from Centaurus A
• Time dependent gamma-ray production in the anisotropic IC $e^{\pm }$ pair cascade initiated by electrons in active galaxies
• Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus A
• Interpreting correlated observations of cosmic rays and gamma-rays from Centaurus A with a proton blazar inspired model
• Probing Lorentz Invariance at EeV Energy
• Centaurus A at Ultra-High Energies
• The X-ray Afterglow of Dark GRB 970815: A Common Origin for GRBs and XRFs?
• Neutrino production from photo-hadronic interactions of the gamma flux from Active Galactic Nuclei with their gas content
• Imaging and Spectral Fitting of Bright Gamma-ray Sources with the COSI Balloon Payload