[AAVSO-HEN] GRB 091024 Gemini-North redshift

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  10065
SUBJECT: GRB 091024 Gemini-North redshift
DATE:    09/10/24 13:49:15 GMT
FROM:    Nial Tanvir at IofA U.Cambridge  <nrt at ast.cam.ac.uk>

A. Cucchiara, D. Fox (PSU) & N. Tanvir (U. Leicester) report:

We observed the afterglow of GRB 091024 (Marshall et al. GCN 10062;
Mundell et al. GCN 10063) with the GMOS-N spectrograph on Gemini North
beginning at 10.43 UT.  The resultant spectrum, which spans 5925A to 10200A,
shows a strong continuum and well detected lines of CaII H & K, MgI (2853A)
at a common redshift of z=1.092.  Further analysis is ongoing.

We thank the Gemini-N support staff, in particular R. Pike, for
obtaining these observations.