Observations of active galactic nuclei with the GT-48 CrAO gamma-ray telescope in 2004
Abstract
Observations of several active galactic nuclei were performed with the GT-48 gamma-ray telescope at CrAO in 2004: 3C 66A, Mk 421, Mk 501, 1H 1426, 1ES 1959, and BL Lac. Very-high-energy (E ≥ 1012 eV) gamma-ray fluxes were recorded from 3C 66A, Mk 421, Mk 501, and 1H 1426 at a confidence level of more than 4σ. Upper limits for the flux of very-high-energy gamma rays are presented for 1ES 1959 and BL Lac. The 2004 observational data for 3C 66A (z = 0.44) confirm the results obtained previously at CrAO.
- Publication:
-
Bulletin Crimean Astrophysical Observatory
- Pub Date:
- June 2007
- DOI:
- 10.3103/S0190271707010032
- Bibcode:
- 2007BCrAO.103...16N
- Keywords:
-
- galaxies;
- gamma-ray emission