Published December 1, 2009 | Version v1
Journal article

VERITAS UPPER LIMIT ON THE VERY HIGH ENERGY EMISSION FROM THE RADIO GALAXY NGC 1275

  • 1. Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645 (United States)
  • 2. Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716 (United States)
  • 3. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)
  • 4. Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064 (United States)
  • 5. Physics Department, McGill University, Montreal, QC H3A 2T8 (Canada)
  • 6. Department of Physics, Washington University, St. Louis, MO 63130 (United States)
  • 7. School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT (United Kingdom)
  • 8. Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States)
  • 9. School of Physics, University College Dublin, Belfield, Dublin 4, Republic of Ireland (Ireland)
  • 10. School of Physics, National University of Ireland, Galway, Republic of Ireland (Ireland)
  • 11. Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605 (United States)
  • 12. Department of Physics, Purdue University, West Lafayette, IN 47907 (United States)
  • 13. Department of Physics, Grinnell College, Grinnell, IA 50112-1690 (United States)

Description

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.

Availability note (English)

Available from http://dx.doi.org/10.1088/0004-637X/706/2/L275

Additional details

Identifiers

Publishing Information

Journal Title
Astrophysical Journal (Online)
Journal Volume
706
Journal Issue
2
Journal Page Range
p. L275-L280
ISSN
1538-4357