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gamma ray source comparison table
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gamma-ray burstor center of gravity isotropic with an increase towards the galactic centercelestial sphere gamma ray source  gamma ray   0.1 - 4 sJuly 2, 19670.1-1.2 MeV 5 per yearShort, intense, low-energy bursts, first recorded by the Vela satellite system on 1967 July 2. Their isotropic distribution suggests an extragalactic origin, but a galactic disk origin cannot be ruled out: there is a large increase in γ-ray flux in the direction of the galactic center. 

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