[vsnet-grb-info 8701] GRB 091127: Gemini-N redshift
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sat Nov 28 20:27:52 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 10202
SUBJECT: GRB 091127: Gemini-N redshift
DATE: 09/11/28 11:27:46 GMT
FROM: Antonino Cucchiara at PSU <cucchiara at 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.
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