VERITAS UPPER LIMIT ON THE VERY HIGH ENERGY EMISSION FROM THE RADIO GALAXY NGC 1275
- Fred Lawrence Whipple Observatory, Harvard-Smithsonian Center for Astrophysics, Amado, AZ 85645 (United States)
- Department of Physics and Astronomy and the Bartol Research Institute, University of Delaware, Newark, DE 19716 (United States)
- Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)
- Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz, CA 95064 (United States)
- Physics Department, McGill University, Montreal, QC H3A 2T8 (Canada)
- Department of Physics, Washington University, St. Louis, MO 63130 (United States)
- School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT (United Kingdom)
- Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States)
- School of Physics, University College Dublin, Belfield, Dublin 4, Republic of Ireland (Ireland)
- School of Physics, National University of Ireland, Galway, Republic of Ireland (Ireland)
- Astronomy Department, Adler Planetarium and Astronomy Museum, Chicago, IL 60605 (United States)
- Department of Physics, Purdue University, West Lafayette, IN 47907 (United States)
- Department of Physics, Grinnell College, Grinnell, IA 50112-1690 (United States)
The recent detection by the Fermi gamma-ray space telescope of high-energy gamma-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 gamma-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.
- OSTI ID:
- 21385090
- Journal Information:
- Astrophysical Journal (Online), Vol. 706, Issue 2; Other Information: DOI: 10.1088/0004-637X/706/2/L275; ISSN 1538-4357
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COSMOLOGY AND ASTRONOMY
CRAB NEBULA
EMISSION
EXTRAPOLATION
GALAXY NUCLEI
GAMMA RADIATION
GEV RANGE 100-1000
RADIO GALAXIES
SPECTRA
TELESCOPES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ENERGY RANGE
GALAXIES
GEV RANGE
IONIZING RADIATIONS
MATHEMATICAL SOLUTIONS
NEBULAE
NUMERICAL SOLUTION
RADIATIONS
SUPERNOVA REMNANTS