Centaurus A observation at MeV-gamma-ray energies

Details Centaurus A observation at MeV-gamma-ray energies Centaurus A observation at MeV-gamma-ray energies

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..134v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 1, 1987, p. 134-142.

Astronomy and Astrophysics

Astronomy

46

Centaurus Constellation, Gamma Ray Astronomy, Radio Galaxies, Spectral Energy Distribution, X Ray Sources, Balloon-Borne Instruments, Compton Effect, Gamma Ray Spectra, X Ray Spectra

Scientific paper

γ-ray emission above 700 keV from the direction of Centaurus A was detected during a balloon flight with the MPI Compton telescope. The statistical significance of the source detection is 4.1 σ. The location of the source, the profile of the derived source image, and the intensity and shape of the derived energy spectrum strongly suggest that the detected radiation is related to Cen A. The energy spectrum extends into the MeV range at least up to 8 MeV and connects well to the power-law spectrum, which so far has been measured up to several hundred keV. The hard X-ray/soft γ-ray spectrum can be interpreted as a thermal Comptonization spectrum.

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