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Veritas upper limit on the very high energy emission from the radio galaxy NGC 1275
Language
en
Article de revue
This item was published in
The Astrophysical journal letters. 2009-12-01, vol. 706, p. L275-L280
Bristol : IOP Publishing
English Abstract
The recent detection by the Fermi γ-ray space telescope of high-energy γ-rays from the radio galaxy NGC 1275 makes the observation of the very high energy (VHE: E>100 GeV) part of its broadband spectrum particularly ...Read more >
The recent detection by the Fermi γ-ray space telescope of high-energy γ-rays from the radio galaxy NGC 1275 makes the observation of the very high energy (VHE: E>100 GeV) part of its broadband spectrum particularly interesting, especially for the understanding of active galactic nuclei with misaligned multi-structured jets. The radio galaxy NGC 1275 was recently observed by VERITAS at energies above 100 GeV for about 8 hr. No VHE γ-ray emission was detected by VERITAS from NGC 1275. A 99% confidence level upper limit of 2.1% of the Crab Nebula flux level is obtained at the decorrelation energy of approximately 340 GeV, corresponding to 19% of the power-law extrapolation of the Fermi Large Area Telescope result.Read less <
English Keywords
Perseus A)
galaxies: Seyfert
gamma rays: observations
galaxies: individual (NGC 1275
3C 84
Origin
Hal imported