Observations of the Gamma-Ray Flux from the Galaxy Mk 501

Details Observations of the Gamma-Ray Flux from the Galaxy Mk 501 Observations of the Gamma-Ray Flux from the Galaxy Mk 501

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000astl...26..199a&link_type=abstract

Astronomy Letters, vol. 26, p. 199-203 (2000)

Astronomy and Astrophysics

Astronomy

7

Scientific paper

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) x 10^{-11} and (3.7 +/- 0.6) x 10^{-11} phot/cm^2/s, respectively. The errors are the sum of statistical observational and modeling errors. The mean power released in the form of gamma-rays is 2 x 1043 erg/s/sr.

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