GRB 060912A
GCN Circular 5573
Subject
GRB 060912A: Probable Host Galaxy
Date
2006-09-14T12:59:41Z (19 years ago)
From
Andrew Levan at U.of Leicester <anl@star.le.ac.uk>
A.J. Levan, P. Jakobsson, R. Chapman (U. Hertfordshire), N. Tanvir, E.Rol
(U. Leicester) report for a larger collaboration:
We observed the location of GRB 050912A using the VLT and FORS1 in the VRI
bands beginning at Sept 14. 03:51 UT. At the location of the optical
afterglow given by Hurkett et al. (GCN Circ. 5558) we find an extended
source which we suggest is the host galaxy of GRB 060912A. The location
of the afterglow lies at the eastern end of this galaxy and the afterglow
may still contribute significantly at this time.
Images of the field can be found at
http://star-www.herts.ac.uk/~levan/060912A/
We thank the staff of the VLT for their assistance with these
observations.
GCN Circular 5574
Subject
GRB 060912A: VLA Observation
Date
2006-09-14T14:45:18Z (19 years ago)
From
Poonam Chandra at U Virginia/NRAO <pc8s@virginia.edu>
P. Chandra (UVA/NRAO) and D. A. Frail (NRAO) report on behalf of
the Caltech-NRAO-Carnegie GRB Collaboration:
"We observed the field centered on the BAT position of the Swift burst GRB
060912A (GCN#5562) using the VLA at a frequency of 8.46 GHz and starting
at 8.19 UT on September 14, 2006. There is no detection of the GRB with
2-sigma upper limit of 65 microJy.
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc."
GCN Circular 5617
Subject
GRB 060912A: Redshift of probable host galaxy
Date
2006-09-26T20:17:04Z (19 years ago)
From
Pall Jakobsson at U Hertfordshire <palli@star.herts.ac.uk>
P. Jakobsson, A. Levan, R. Chapman (U. Hertfordshire), E. Rol,
N. Tanvir (U. Leicester), P. Vreeswijk (ESO), D. Watson (DARK, NBI)
We obtained 6*1200 s spectra of the proposed host galaxy of
GRB 060912A (Levan et al. GCN 5573), using FORS2 on the VLT.
The combined spectrum shows a very strong emission line at 7218A
which we identify with [OII] 3727A at a redshift of z = 0.937. At
the same redshift we also identify H-gamma in emission and possibly
NeIII 3869A. The properties of this host galaxy (in particular
strong [OII] emission) are similar to those seen in long-duration
GRB hosts. We conclude that the proximity of this burst to a low
redshift elliptical galaxy was most likely coincidental.
We thank the VLT staff for their assistance in these observations.