[vsnet-grb-info 6017] GRB 080430: Hobby-Eberly Telescope Absorption Redshift

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7654
SUBJECT: GRB 080430:  Hobby-Eberly Telescope Absorption Redshift 
DATE:    08/05/01 10:47:05 GMT
FROM:    Antonino Cucchiara at PSU  <cucchiara at astro.psu.edu>

A. Cucchiara and D. B. Fox (Penn State) report:

"Starting on 2008 May 1.21 UT we used the Marcario LRS spectrograph
on the Hobby-Eberly Telescope (R ~ 230) to obtain a 1200s spectrum
of the optical afterglow of GRB 080430 (Guidorzi et al., GCN 7647).
The spectrum covers the wavelength range 4100 to 10,500 Angstrom.  We
clearly observe metal absorption features corresponding to the MgII
doublet (2796, 2803 A) and MgI (2852 A) at redshift z = 0.767. The
spectrum does not show any other significant features, consistent
with Calar Alto telescope observations (de Ugarte Postigo et al.,
GCN 7650).

We thank the HET staff for performing this observation."