GCN Circular 7154
Subject
GRB 071227: Magellan redshift confirmation
Event
Date
2007-12-28T15:01:25Z (18 years ago)
From
Edo Berger at Princton U <eberger@astro.princeton.edu>
E. Berger (Princeton), N. Morrell and M. Roth (LCO) report:
"We obtained three 900-s spectra of the candidate host galaxy of GRB
071227 (GCNs 7150,7151) with IMACS on the Magellan/Baade telescope. We
find the same emission line noted by D'Avanzo et al. (GCN 7152), as well
as a second emission line which corresponds to [OIII]5006 at the same
redshift. From preliminary wavelength calibration we find z=0.384. If
this is the host galaxy of GRB 071227, the observed fluence of 2.2e-7
erg/cm^2 (GCN 7148) translates to an isotropic-equivalent gamma-ray energy
of 8e49 erg, typical of previous short GRBs."