Is 3C111, an apparently normal radio galaxy, the counterpart of 3EG J0416+3650?

Abstract

The Third EGRET Catalog (3EG) lists 66 high-confidence identifications of sources with Active Galactic Nuclei (AGN). All are classified as belonging to the blazar class, with the only exception of the nearby radio galaxy Centaurus A. We report and strengthen the association of another radio galaxy, 3C111, with the EGRET source 3EG J0416+3650. At the time of the compilation of the 3EG catalogue, 3C111 has been considered as a low-confidence counterpart of 3EGJ0416+3650, being located outside the 99% gamma-ray probability contour. Since this first suggestion, no other counterparts have been reported nor the EGRET error box has been searched for likely candidates. 3C111 has never been considerated or cited in literature as a radiogalaxy counterpart of an EGRET source. We report a detailed multiwavelength study of the EGRET error box as well as for the first time the overall spectral energy distribution of 3C111, which appears to be intriguingly similar to those of blazars, suggesting that the radiogalaxy 3C111 is the likely counterpart of 3EG J0416+3650.

arXiv comment8 pages, 4 figure, 3 tables, accepted for publication in A&A

References in corpus (13)

• A theoretical unifying scheme for gamma-ray bright blazars
• The Identification of EGRET Sources with Flat-Spectrum Radio Sources
• Variability of EGRET Gamma-Ray Sources
• The BL Lac heart of Centaurus A
• A variability analysis of low-latitude unidentified gamma-ray sources
• Hard X-Ray Spectra of Broad-Line Radio Galaxies from the Rossi X-Ray Timing Explorer
• GeV emission from the nearby radio galaxy Centaurus A
• Is the EGRET source 3EG J1621+8203 the radio galaxy NGC 6251?
• The nuclear SED of NGC6251: a BL Lac in the center of an FR I radio galaxy
• Discovery of a new radio galaxy within the error box of the unidentified gamma-ray source 3EG J1735-1500
• X-ray spectroscopy of the broad line radio galaxy 3C111
• 3EG J2027+3429 another Blazar behind the Galactic Plane
• Large-Scale Regular Morphological Patterns in the Radio Jet of NGC 6251

Cited by in corpus (14)

• Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
• Fermi Large Area Telescope Observations of Misaligned AGN
• Connection between the Accretion Disk and Jet in the Radio Galaxy 3C 111
• Gamma ray astrophysics: the EGRET results
• GPS radio sources: new optical observations and an updated master list
• Fermi Gamma-ray Space Telescope: High-Energy Results from the First Year
• The Trails of Superluminal Jet Components in 3C111
• Gamma-Ray Emission from the Broad-Line Radio Galaxy 3C111
• The High Energy view of the Broad Line Radio Galaxy 3C 111
• The Radio to Gamma Ray Connection of EGRET Blazars: Correlation, Regression and Monte Carlo Analysis
• The nature of a broad line radio galaxy: Simultaneous RXTE and Chandra HETG observations of 3C 382
• XMM-Newton and ESO observations of the two unidentified gamma-ray sources 3EG J0616-3310 and 3EG J1249-8330
• The nature of the multi-wavelength emission of 3C 111
• Astrophysics in 2005