Inverse Compton radiation from GRB afterglows in the VHE range
2019 July 29
The observation of Gamma-ray bursts (GRBs) can be classified into prompt and afterglow emission. The prompt emission is observed for up to 100s of seconds after the trigger of the event while a delayed and long-lasting afterglow emission is followed after this phase. The prompt emission dominates in the γ-rays (keV-MeV-GeV), while the afterglow emission mainly occurs in X-ray, UV, optical, radio wavelengths and possibly in γ-rays. In this work, we study the signature of inverse Compton emission in the afterglow emission of GRBs. We consider the expansion of an adiabatic blast wave into a constant density medium and use the observation of GRB 130427A afterglow to constrain the model parameters. The flux produced via inverse-Compton mechanism have been discussed and also possible detection by the Cherenkov Telescope Array mainly in the range 30 GeV- 1 TeV have been discussed.