[vsnet-grb-info 5003] GRB 070721B: correct afterglow position
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Mon Aug 6 23:34:52 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 6713
SUBJECT: GRB 070721B: correct afterglow position
DATE: 07/08/06 14:34:46 GMT
FROM: Daniele Malesani at Niels Bohr Inst,Dark Cosmology Center <malesani at astro.ku.dk>
D. Malesani (DARK) reports:
I have looked again at the NOT and VLT images of GRB 070721B (Ziaeepour
et al., GCN 6640), and realized there has been some confusion in what
reported in our GCNs 6651 and 6655.
The correct afterglow position is (J2000):
RA = 02:12:32.97
Dec = -02:11:40.4
with an estimated error of 0.5". This position is within 0.4" of and
consistent with the UVOT afterglow position as reported by Schady (GCN
6641). In the finding chart (Malesani et al., GCN 6651) posted at
http://www.astro.ku.dk/~malesani/GRB/070721B/
the afterglow corresponds to object #1, and not #2 as written in GCN
6655 (Fynbo et al.). Object #2 (RA = 02:12:33.03, Dec = -02:11:40.6) is
a closeby, real object, likely unrelated to the GRB. The redshift
z=3.626 reported in GCN 6651 correctly refers to the afterglow.
I apologize for any confusion this may have created.
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