Probing Early Cosmic Magnetic Fields through Pair Echos from High-Redshift GRBs

Keitaro Takahashi, Susumu Inoue, Kiyotomo Ichiki +1

We discuss the expected properties of pair echo emission from gamma-ray bursts (GRBs) at high redshifts ($z\gtrsim 5$), their detectability, and the consequent implications for pr…