A VERY METAL-POOR DAMPED LYMAN-α SYSTEM REVEALED THROUGH THE MOST ENERGETIC GRB 090926A
A VERY METAL-POOR DAMPED LYMAN-α SYSTEM REVEALED THROUGH THE MOST ENERGETIC GRB 090926A
We present VLT/FORS2 spectroscopy and Gamma-ray Optical/Near-Infrared Detector optical/near-IR photometry of the afterglow of the bright Fermi/LAT GRB 090926A. The spectrum shows prominent Lyman-α absorption with cm−2 and a multitude of metal lines at a common redshift of z = 2.1062 ± 0.0004, which we associate with the redshift of …