GCN Circular 10202
Subject
GRB 091127: Gemini-N redshift
Date
2009-11-28T11:27:46Z (15 years ago)
From
Antonino Cucchiara at PSU <cucchiara@astro.psu.edu>
A. Cucchiara, D. Fox (PSU), A. Levan (Warwick U.) and
N. Tanvir (U. Leicester) report:
On November 28.40 UT we observed the afterglow of the Swift
GRB 091127 (Troja et al. GCN 10191; Smith et al. GCN 10192)
with the GMOS-N spectrograph on Gemini North.
The observation consists of 2 exposures of 900 seconds each
with the R400 grating, covering 4000-8000A wavelength range.
The spectra shows a bright featureless continuum and two emission
lines which we identified as [OIII]4959 and 5007 respectively
at the common redshift of z = 0.490.
Therefore we suggest this as redshift for GRB 091127.
We thank the Gemini-N support staff, in particular A. Stephens,
for performing these observations.