GRB 130606A within a sub-DLA at redshift 5.91

Understand

Events such as GRB130606A at z=5.91, offer an exciting new window into pre-galactic metal enrichment in these very high redshift host galaxies.

• We study the environment and host galaxy of GRB 130606A, a high-z event, in the context of a high redshift population of GRBs.
• We have obtained multiwavelength observations from radio to gamma-ray, concentrating particularly on the X-ray evolution as well as the optical photometric and spectroscopic data analysis.
• With an initial Lorentz bulk factor in the range \Gamma_0 ~ 65-220, the X-ray afterglow evolution can be explained by a time-dependent photoionization of the local circumburst medium, within a compact and dense environment.