[AAVSO-HEN] GRB 091208B: Gemini-North redshift

[grb at aavso.org]

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TITLE:   GCN CIRCULAR
NUMBER:  10263
SUBJECT: GRB 091208B: Gemini-North redshift
DATE:    09/12/08 15:09:46 GMT
FROM:    Klaas Wiersema at U of Leicester  <kw113 at star.le.ac.uk>

K. Wiersema, N. R. Tanvir (U. Leicester), A. Cucchiara (PSU),
A. J. Levan (U. Warwick) & D. Fox (PSU) report:

We observed the afterglow of GRB 091208B (Pagani et al. GCN 10256;
de Ugarte Postigo et al. GCN 10255) with the GMOS-N spectrograph on Gemini
North, beginning at 11:17 UT on December 8. We use the R400 grism.
The resulting spectrum covers the wavelength range 4000-8400 A and shows 
clear absorption lines of the MgII doublet (2796,2803), MgI (2853), FeI 
(2967), FeII (2586,2600) and MnII (2576,2594,2606) at a common redshift
of z = 1.063.

We thank the Gemini-N staff, in particular K. Chiboucas, for
performing this observation.