GCN Circular 3088
Subject
GRB 050126: Redshift determination
Date
2005-03-12T02:37:37Z (20 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (Carnegie Observatories), S.B. Cenko and S.R. Kulkarni (Caltech)
report on behalf of a larger collaboration:
"We obtained spectra of the host galaxy of GRB 050126 with the Echelle
Spectrograph and Imager (ESI) mounted on the Keck II telescope.
Inspection of the 2-d and extracted spectra reveals a single emission line
at an observed wavelength of 8536.5 angstrom with continuum emission both
redward and blueward of the line. Interpreted as [OII]3727 this indicates
a redshift of z=1.29, the first for any Swift GRB. At this redshift,
given a fluence of 2e-6 erg/cm^2 (Berger et al. astro-ph/0502468), the
isotropic-equivalent gamma-ray energy is 8.7e51 erg."