GCN Circular 5922
Subject
GRB 061210: Optical sources near XRT positions
Event
Date
2006-12-14T19:27:09Z (20 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (Carnegie Observatories) reports on behalf of a larger
collaboration:
"Inspection of our Gemini/GMOS images (GCN #5912) at the positions of XRT
sources S1 and S2 (GCN #5921) reveal the presence of several extended
optical sources, one of which may be the host galaxy of GRB 061210.
Within the error circle of source S1 we detect a single extended object
with r=24.8+/-0.2 mag (S1-G1).
Similarly, within the error circle of source S2 we detect an extended
object with r=24.8+/-0.2 mag (S2-G1), as well as a brighter galaxy with a
bulge-dominated morphology on the edge of the error circle with
r=21.0+/-0.02 mag (S2-G2), and a third galaxy about 1.5" outside of the
error circle with r=22.9+/-0.05 mag (S2-G3). All magnitudes are derived
using the zeropoint available on the GMOS website.
We note that the elliptical object EO1509-0232011 mentioned in GCN 5921 is
not visible in our images (or in DSS2) and it is likely to be a high
proper motion star.
In the absence of X-ray or optical variability it is unclear which (if
any) of these galaxies is the host of GRB 061210. However, if source S2
is shown to be the X-ray afterglow, the most likely host galaxy is S2-G2
given its brightness and consistent location with the XRT error circle."