The highest redshift GRBs

Author: Nial Tanvir

Abstract: GRBs remain the most distant sources for which spectroscopic redshifts have been determined. High-z GRBs are beacons of early star formation, and provide unique insights into galaxies in the epoch of reionization. I will review our knowledge of high-z GRBs, including the recent events GRB 120521C and 120923A, and discuss the evidence concerning their hosts and environments.