ISSN:
1562-6873
Keywords:
active galactic nuclei
;
gamma-ray observations
;
quasars and radio galaxies
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We present two-year-long observations of the flux of very-high-energy (∼1012 eV) gamma rays from the active galactic nucleus Mk 501 performed with a Cherenkov detector at the Crimean Astrophysical Observatory. A gamma-ray flux from the object was shown to exist at confidence levels of 11 and 7 standard deviations for 1997 and 1998, respectively. The flux varied over a wide range. The mean flux at energies 〉1012 eV, as inferred from the 1997 and 1998 data, is (5.0±0.6)×10−11 and (3.7±0.6)×10−11 cm−2 s−1, respectively. The errors are the sum of statistical observational and modeling errors. The mean power released in the form of gamma rays is ∼2×1043 erg s−1 sr−1.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.20382
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