[vsnet-grb-info 2098] GRB 050904: Subaru Optical Spectroscopy

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3937
SUBJECT: GRB 050904: Subaru Optical Spectroscopy
DATE:    05/09/07 16:38:55 GMT
FROM:    Nobuyuki Kawai at Tokyo Tech  <nkawai at hp.phys.titech.ac.jp>

N. Kawai (Tokyo Tech), T. Yamada (NAOJ), G. Kosugi, T. Hattori, and
K. Aoki (Subaru/NAOJ) report on behalf of Subaru GRB team:

"We observed the field of GRB 050904 (GCN 3910) with Faint Object
Camera And Spectrograph on the Subaru 8.2m telescope atop Mauna
Kea on the night of September 6, approximately 3.5 days after the
burst.  We obtained spectra of the afterglow candidate (Haislip et
al. GCN 3913, 3922, D'Avanzo et al. GCN 3921).

Based on the absorption features we measure the redshift to be
z=6.29 +- 0.01, confirming the photometoric redshift reported
earlier (Haislip et al. GCN 3914, 3919, Antonelli et al. GCN 3924)."

This message may be cited.