TeV gamma-ray emission from point sources: Galactic and extragalactic

Five years of TeV observations from two BL Lac objects Markarian 421, Markarian 501, Seyfert Galactic NGC and gamma-ray emission from Cygnus X-3 and supernova remnants Crab Nebula by SHALON-ALATOO observatory are presented. The observatory SHALON-ALATOO has just announced the TeV detection of NGC 1275 gamma-rays. Results obtained with the Mirror Cherenkov telescope SHALON-1 (mirror area more than 11.2 m 2 ) point out that, in view of the fact that at present a more intensive total flux of gamma-quanta with energies higher than 10 12 eV is observed from Extragalactic sources in comparison with a near located source Crab Nebula (Galactic source), it is possible to assume that the major part of cosmic rays with E>10 13 eV, observable in Earth space, also comes from Extragalaxy. The observable energy spectra of gamma - quanta in the energy interval 10 12 – 10 13 eV, from both close sources in our galaxy, and quasars, blazars and active galactic centers do not contradict too uniform proportionality ∼ E −2.4 ± 0.1 dE . If one considers that this spectrum presents an energy spectrum of protons and nuclei of cosmic rays in local areas of their acceleration, then there is a problem in what processes a uniform spectrum of cosmic rays in the energy interval from ∼ 10 11 eV to > 3 × 10 19 eV is generated.

talk: Campinas 2000/07/17

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Figures(0)

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- 26ICRC 3 (1999) 418