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Veritas upper limit on the very high energy emission from the radio galaxy NGC 1275

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 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.
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Contributor : Virginie Mas <>
Submitted on : Monday, March 1, 2010 - 3:27:00 PM
Last modification on : Wednesday, May 13, 2020 - 6:20:04 PM

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V. A. Acciari, E. Aliu, T. Arlen, T. Aune, M. Bautista, et al.. Veritas upper limit on the very high energy emission from the radio galaxy NGC 1275. Astrophysical Journal Letters, IOP Science, 2009, 706, pp.L275-L280. ⟨10.1088/0004-637X/706/2/L275⟩. ⟨in2p3-00460536⟩

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