Gamma-rays of TeV energy from plerions and results of CANGAROO project Original Research Article

Copious production of electrons and positrons results in very high energy gamma-rays from the sources such as pulsar nebulae and supernova remnants. The emission at TeV energies is characterized and controlled by the interaction of high energy photons and electrons. The radiation of electrons links the TeV region tightly to the other bands, giving us the means of ‘multiwavelengths analysis’ to investigate production, acceleration and interaction of energetic particles. The absoption of TeV gamma-rays due to creation of electron and positron pairs puts constraints on the emission size of detectable sources. The point-like source of gamma-rays by proton progenitor still remains to be uncovered.