3C66B as a TeV radiogalaxy
arXiv:0811.1883 · doi:10.1111/j.1745-3933.2009.00629.x
Abstract
The MAGIC collaboration reported the detection of a new VHE source, MAGIC J0223+430, located close to the position of the blazar 3C66A, considered a candidate TeV blazar since a long time. A careful analysis showed that the events with energies above 150 GeV are centered on the position of the FRI radiogalaxy 3C66B (at 6 arcmin from 3C66A), with a probability of 95.4% (85.4% including systematic uncertainties) that the source is not related to 3C66A. We present a model for the possible emission of 3C66B based on the structured jet model already used to interpret the TeV emission of the radiogalaxy M87. The model requires parameters similar to those used for M87 but a larger luminosity for the layer, to account for the more luminous TeV emission. We also show that the spectrum obtained by MAGIC can be interpreted as the combined emission of 3C66B, dominating above ~200 GeV, and of 3C66A. The high-energy emission from the latter source, being strongly attenuated by the interaction with the extragalactic background light, can only contribute at low energies. If we were to see the jet emission of 3C 66B at small viewing angles we would see a spectral energy distribution closely resembling the one of S5 0716+714, a typical blazar.
5 pages, 2 figures, accepted for publication by MNRAS
References in corpus (32)
- The extragalactic optical-infrared background radiations, their time evolution and the cosmic photon-photon opacity
- A low level of extragalactic background light as revealed by gamma-rays from blazars
- Structured jets in TeV BL Lac objects and radiogalaxies
- The power of blazar jets
- Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
- Fast variability of TeV gamma-rays from the radio galaxy M 87
- Implications of Cosmological Gamma-Ray Absorption II. Modification of gamma-ray spectra
- VLBI Observations of a Complete Sample of Radio Galaxies. 10 Years Later
- Hard X-ray properties of blazars
- Dynamical models for jet deceleration in the radio galaxy 3C 31
- New limits on the density of the extragalactic background light in the optical to the far-infrared from the spectra of all known TeV blazars
- Imaging redshifts of BL Lac objects
- Chandra and XMM-Newton Observations of a Sample of Low-Redshift FRI and FRII Radio-Galaxy Nuclei
- Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87
- Is the Giant Radio Galaxy M87 a TeV Gamma-Ray Emitter?
- Spine-sheath layer radiative interplay in subparsec-scale jets and the TeV emission from M87
- Superluminal Radio Features in the M87 Jet and the Site of Flaring TeV Gamma-ray Emission
- Six years of BeppoSAX observations of blazars: a spectral catalog
- The Chandra view of the 3C/FRI sample of low luminosity radio-galaxies
- Very High Energy Gamma-Ray Observations of a Strong Flaring Activity in M87 in 2008 February
- Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
- A synchrotron self-Compton scenario for the very high energy gamma-ray emission of the radiogalaxy M87
- High Energy gamma-rays From FR I Jets
- Radio, optical and X-ray nuclei in nearby 3CRR radio galaxies
- Is the core of M87 the source of its TeV emission? Implications for unified schemes
- The BL Lac objects OQ 530 and S5 0716+714. Simultaneous observations in the X-rays, radio, optical and TeV bands
- Core Radio and Optical Emission in Nearby FR I Radio Galaxies
- Discovery of a very high energy gamma-ray signal from the 3C 66A/B region
- The nuclei of radio galaxies in the UV: the signature of different emission processes
- XMM-Newton observations of a sample of gamma-ray loud active galactic nuclei
- Redshift Limits of BL Lacertae Objects from Optical Spectroscopy
- A multi-wavelength test of the FR~I - BL Lac unifying model
Cited by in corpus (12)
- The transition between BL Lac objects and Flat Spectrum Radio Quasars
- TeV BL Lac objects at the dawn of the Fermi era
- MAGIC Gamma-ray Telescope Observation of the Perseus Cluster of Galaxies: implications for cosmic rays, dark matter, and NGC1275
- MAGIC observations and multiwavelength properties of the quasar 3C279 in 2007 and 2009
- Discovery of Very High Energy gamma-rays from the blazar S5 0716+714
- Discovery of a very high energy gamma-ray signal from the 3C 66A/B region
- Multi-wavelength characterization of the blazar S5~0716+714 during an unprecedented outburst phase
- Observations of the Blazar 3C 66A with the MAGIC Telescopes in Stereoscopic Mode
- Powerful high energy emission of the remarkable BL Lac object S5 0716+714
- On radiative acceleration in spine-sheath structured blazar jets
- Proper Motion of the Sub-Parsec Scale Jet in the Radio Galaxy 3C 66B
- Physics Insights from Recent MAGIC AGN Observations