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Title:
Gamma-ray emission from the galactic anticenter at MeV energies
Authors:
Graser, U.; Schoenfelder, V.
Affiliation:
AA(Max-Planck-Institut für Physik und Astrophysik, Garching bei München, Germany), AB(Max-Planck-Institut für Physik und Astrophysik, Garching bei München, Germany)
Publication:
Astrophysical Journal, Part 1, vol. 263, Dec. 15, 1982, p. 677-689. (ApJ Homepage)
Publication Date:
12/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Crab Nebula, Galactic Radiation, Gamma Ray Astronomy, Milky Way Galaxy, Seyfert Galaxies, Balloon-Borne Instruments, Cosmic Rays, Diffuse Radiation, Electron Energy, Energy Spectra, Gamma Ray Telescopes, Pulsars, X Ray Sources
DOI:
10.1086/160539
Bibliographic Code:
1982ApJ...263..677G

Abstract

Balloon-borne MPI Compton telescope data are used to derive an image of the anticenter region of the galaxy between right ascension 50 and 110 deg and declination +10 and +50 deg, in the 1.1-10 MeV energy range. Significantly enhanced gamma-ray emission is observed along the galactic plane from 160 to 197 deg, with part of the emission being due to the Crab Nebula. No significantly enhanced gamma-ray emission is observed from the direction of the high energy gamma-ray source Geminga, or from the Seyfert galaxy MCG 8-11-11, which was recently reported to be a soft gamma-ray source. The diffuse galactic gamma-ray emission limit determined leads to restrictions of the spectrum of interstellar cosmic ray electrons at MeV energies.

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