GCN Circular 14621
Subject
GRB 130511A: Gemini-North Redshift
Date
2013-05-11T13:17:16Z (11 years ago)
From
Antonino Cucchiara at UCSC/UCO Lick <acucchia@ucolick.org>
A. Cucchiara (UCSC) and N. R. Tanvir (U. Leicester)
report on behalf of a larger collaboration:
On May 11.511 UT (~45 minutes after the Swift trigger)
we observed the optical counterpart of GRB 130511A
(Krimm et al. GCN 14620) with the GMOS spectrograph
mounted on the Gemini-North telescope.
The observation consists of 2x900s exposures
using the B600 grating and covers the 5100-7900
Angstroms wavelength range.
The resulting spectrum presents several absorption lines,
including FeII(2344,2382,2374,2600), FeII*(2338,2349),
FeI2463, MnII(25762594), MgII doublet (2796,2803A), and
MgI2853 at the common redshift of z=1.3033.
We therefore propose this as the redshift of GRB 130511A.
We thank the Gemini staff for performing this
observation, in particular Tom Geballe.