GCN Circular 12537
Subject
GRB 111107A: Gemini-South Redshift
Date
2011-11-07T06:31:01Z (13 years ago)
From
Ryan Chornock at Harvard <rchornock@cfa.harvard.edu>
R. Chornock, E. Berger (Harvard), and D. Fox (Penn St.) report:
We obtained spectroscopy of the optical afterglow of GRB 111107A (Siegel
et al., GCN 12534; LaCluyze et al., GCN 12535; Kruehler et al., GCN
12536) using GMOS-South on the Gemini-South 8-m telescope. Observations
began at 05:05 UT (4.2 hrs after the BAT trigger). Inspection of the
first two exposures (range 4160-8140 Angstroms) reveals a damped
Lyman-alpha absorber as well as narrow absorption lines of C IV, Al II,
and C II at a common redshift of 2.893.