Optical counterparts of cosmological GRBs due to heating of ISM in the parent galaxy

Abstract

We investigated influence of cosmological GRB on the surrounding interstellar medium. It was shown that γ-radiation from the burst heats interstellar gas to the temperatures > 104 K up to the distance 10 pc. For high density ISM optical and UV radiation of the heated gas can be observed on the Eath several years as a GRB`s counterpart

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