Veritas Upper Limit on the Very High Energy Emission From the Radio Galaxy Ngc 1275

W. Smith, A.; M. Bradbury, S.; Bugaev, V.; Byrum, K.; Cannon, A.; H. Buckley, J.; Celik, O.; Cesarini, A.; Ciupik, L.; Cogan, P.; Cui, W.; J. Fegan, S.; Dickherber, R.; Duke, C.; Fegan, S. J.; P. Finley, J.; Finley, J. P.; Fortin, P.; Fortson, L.; Furniss, A.; Veritas, Collaboration; Galante, N.; Gall, D.; Gibbs, K.; H. Gillanders, G.; Gillanders, G. H.; Godambe, S.; Grube, J.; Guenette, R.; Gyuk, G.; M. Hui, C.; Hanna, D.; Holder, J.; Horan, D.; Hui, C. M.; Humensky, T. B.; Imran, A.; Kaaret, P.; Karlsson, N.; J. Lang, M.; Kertzman, M.; Kieda, D.; Konopelko, A.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; Lebohec, S.; Maier, G.; Mccann, A.; Mccutcheon, M.; N. Otte, A.; Millis, J.; Moriarty, P.; Mukherjee, R.; Ong, R. A.; S. Perkins, J.; Otte, A. N.; Pandel, D.; Perkins, J. S.; Pohl, M.; Quinn, J.; T. Reynolds, P.; Ragan, K.; Reynolds, P. T.; Roache, E.; J. Rose, H.; Rose, H. J.; Schroedter, M.; Sembroski, G. H.; H. Sembroski, G.; Smith, A. W.; Steele, D.; Swordy, S. P.; Theiling, M.; P. Swordy, S.; Toner, J. A.; Varlotta, A.; Vassiliev, V. V.; Vincent, S.; Wagner, R. G.; Wakely, S. P.; Ward, J. E.; Weekes, T. C.; G. Wagner, R.; Weinstein, A.; P. Wakely, S.; Weisgarber, T.; Williams, D. A.; Wissel, S.; E. Ward, J.; C. Weekes, T.; Wood, M.; Zitzer, B.; Kataoka, J.; Cavazzuti, E.; Cheung, C. C.; Lott, B.; Thompson, D. J.; C. Cheung, C.; J. Thompson, D.; Tosti, and G.; Acciari, Va A.; Aliu, E.; Arlen, T.; Aune, T.; Bautista, M.; Beilicke, M.; B. Humensky, T.; Benbow, W.; Boltuch, D.; Bradbury, Sm M.; A. Ong, R.; Buckley, Jh H.; A. Toner, J.; A. Williams, D.

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American Astronomical Society, Astrophysical Journal, 2(706), p. L275-L280, 2009

DOI: 10.1088/0004-637x/706/2/l275

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Veritas Upper Limit on the Very High Energy Emission From the Radio Galaxy Ngc 1275

Journal article published in 2009 by A. W. Smith, S. M. Bradbury, V. Bugaev, K. Byrum, A. Cannon, J. H. Buckley, O. Celik, A. Cesarini, L. Ciupik, P. Cogan, W. Cui, S. J. Fegan, R. Dickherber, C. Duke, S. J. Fegan and other authors.

This paper is made freely available by the publisher.

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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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Veritas Upper Limit on the Very High Energy Emission From the Radio Galaxy Ngc 1275

Abstract