Published December 1, 2009
| Version v1
Journal article
VERITAS UPPER LIMIT ON THE VERY HIGH ENERGY EMISSION FROM THE RADIO GALAXY NGC 1275
Creators
- 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/L275Additional details
Identifiers
Publishing Information
- Journal Title
- Astrophysical Journal (Online)
- Journal Volume
- 706
- Journal Issue
- 2
- Journal Page Range
- p. L275-L280
- ISSN
- 1538-4357
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41113218
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- CRAB NEBULA; EMISSION; EXTRAPOLATION; GALAXY NUCLEI; GAMMA RADIATION; GEV RANGE 100-1000; RADIO GALAXIES; SPECTRA; TELESCOPES
- Descriptors DEC
- COSMIC RADIO SOURCES; ELECTROMAGNETIC RADIATION; ENERGY RANGE; GALAXIES; GEV RANGE; IONIZING RADIATIONS; MATHEMATICAL SOLUTIONS; NEBULAE; NUMERICAL SOLUTION; RADIATIONS; SUPERNOVA REMNANTS