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gamma-ray burst comparison table
Subject has distribution is part of is a kind of has discovery date has duration has energy spectrum has frequency of occurrence has definition
gamma ray source  celestial body     
gamma-ray burstisotropic with an increase towards the galactic centercelestial spheregamma ray sourceJuly 2, 19670.1 - 4 s0.1-1.2 MeV5 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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