[vsnet-grb-info 2317] GRB051022: host galaxy redshift

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4156
SUBJECT: GRB051022: host galaxy redshift
DATE:    05/10/24 07:56:02 GMT
FROM:    Avishay Gal-Yam at Caltech  <avishay at astro.caltech.edu>

A. Gal-Yam (Caltech), E. Berger (OCIW), D. B. Fox (Penn State), A. M.
Soderberg, S. B. Cenko, P. B. Cameron (Caltech) and D. A. Frail (NRAO) 
report on behalf of the Caltech-NRAO-Carnegie collaboration:

"We observed galaxy "B" (GCN 4143), located within the XRT error circle of the
HETE GRB 051022 (GCN 4131; 4137; 4141) and coincident with the radio afterglow
detected by Cameron et al. (GCN 4154), using the double spectrograph mounted
on the 200" Hale telescope at Palomar Observatory. Preliminary reduction of 
a 3600s-long red spectrum of this galaxy reveals a strong line at observed 
wavelength 6736 Angstrom which we identify as OII 3727 at z=0.8. This
identification is supported by weaker detections of OIII 5007 and 4959, as
well as Hbeta and Hgamma. We conclude that the likely host of GRB 051022
is at z=0.8. Further analysis is underway."