[vsnet-grb-info 17144] GRB 151027A: Keck/HIRES redshift
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Oct 27 23:00:09 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 18487
SUBJECT: GRB 151027A: Keck/HIRES redshift
DATE: 15/10/27 13:57:31 GMT
FROM: Daniel Perley at Caltech <dperley at astro.caltech.edu>
D. A. Perley (DARK/NBI), L. Hillenbrand (Caltech), and J. X. Prochaska
(UCO/Lick) report:
We obtained a 900s spectrum of the optical afterglow of GRB 151027A
(Maselli et al., GCN 18478) with Keck/HIRES starting at UT 06:54 on
2015-10-27. In the preliminary reduction, we identify a series of
strong absorption lines including the MgII doublet at z=0.81. Associated
MgI, FeII, and (likely) FeII* are also present, indicating that this is
the redshift of the GRB. Analysis is ongoing.
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