Very high energy γ rays from close active galactic nuclei Mkn 421, Mkn 501, and NGC 1275
The results of observations of two types of metagalactic sources, BLLacs Mkn 421 (z = 0.031) and Mkn 501 (z = 0.034) and the Seyfert galaxy NGC 1275 (z = 0.017) are reported. These observations have been carried out with the SHALON mirror telescope (Lebedev Institute of Physics, Russian Academy of Sciences). The γ-ray fluxes (with energies E > 0.8 TeV) from Mkn 421 and Mkn 501, averaged over the entire observation period, were estimated to be (0.63 ± 0.14) × 10−12 and (0.86 ± 0.13) × 10−12 cm−2 s−1, respectively. The flux from the source NGC 1275 was (0.78 ± 0.13) × 10−12 cm−2 s−1. The energy spectra of γ rays and images of the sources are reported.