GCN Circular 7849
Subject
GRB 080607: Keck/LRIS spectroscopy and redshift
Date
2008-06-07T07:47:19Z (16 years ago)
From
Daniel Perley at U.C. Berkeley <dperley@astro.berkeley.edu>
J. X. Prochaska (UCO/Lick), J. Shiode, J. S. Bloom, D. A. Perley, A. A.
Miller, J. Shiode, D. Starr, R. Kennedy, and J. Brewer (UC Berkeley) report:
Upon receiving the GCN alert we immediately slewed with Keck I (+LRIS)
to the field of GRB 080607 (GCN 7847, Mangano et al.). The optical
transient (GCN 7846, Rujopakarn et al.) was visually identified on the
guider. Spectroscopic observations began at 06:20:35 UT, 13 minutes
after the trigger, using the 600 and 400 line gratings on the blue and
red cameras, respectively, for wavelength coverage between 3000-9300 A.
Our preliminary reduction of the LRIS-b spectrum reveals a very strong,
damped Lya profile and metal-line transitions of OI, SiII, CII, SiII*
among others. These establish the redshift of the GRB to be z=3.036.