[vsnet-grb-info 4139] GRB 061210: Possible Host Galaxy (S2-G2) Keck Spectrum

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  5946
SUBJECT: GRB 061210: Possible Host Galaxy (S2-G2) Keck Spectrum
DATE:    06/12/21 09:11:56 GMT
FROM:    S. Bradley Cenko at Caltech  <cenko at srl.caltech.edu>

S. B. Cenko, M. Kasliwal, P. B. Cameron, S. R. Kulkarni (Caltech) and D.
B. Fox (Penn State) report on behalf of a larger collaboration:

We have obtained a spectrum of the possible host galaxy S2-G2 (Berger, GCN
5922) of the short-hard GRB061210 (Cannizzo et al., GCN 5904).  S2-G2 is
an r=21 galaxy with a bulge-dominated morphology on the outskirts of the
possible XRT afterglow S2 (Godet et al., GCN 5921).  Using the
Low-Resolution Imaging Spectrometer mounted on the 10-m Keck I telescope,
we obtained 2 x 30 min spectra of this galaxy at a mean epoch of ~ 13:30
Dec 19 UT.  We measure a redshift of z = 0.41 based on emission lines of
[OII], [OIII], and HI.  With a 15-150 keV fluence of 1.1e-6 erg/cm^2
(Palmer et al., GCN 5905), this corresponds to an isotropic prompt energy
release of 4.6e50 ergs.