[vsnet-grb-info 16335] GRB 150323A: Keck redshift

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17616
SUBJECT: GRB 150323A: Keck redshift
DATE:    15/03/23 07:20:09 GMT
FROM:    Daniel Perley at Caltech  <dperley at astro.caltech.edu>

D. A. Perley (Caltech) and S. B. Cenko (GSFC) report:

Using the Low Resolution Imaging Spectrometer (LRIS) on the Keck I 10m 
telescope, we acquired a single 900s spectrum of the optical afterglow 
(Cenko et al., GCN 17612) of GRB 150323A (Amaral-Roger et al., GCN 
17611) beginning at 06:11 UT, at the end of evening twilight.

A number of absorption and emission lines are detected in the 1D 
spectrum, including e.g. Fe II (2344,2374,2383,2585,2599), Mg II 
(2796,2803), Mg I (2853), OII (3727), OIII (4959, 5007), and H-beta at a 
common redshift of z=0.593.

We acknowledge S. Kulkarni for the observing time.