Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 6713

Subject
GRB 070721B: correct afterglow position
Date
2007-08-06T14:34:46Z (17 years ago)
From
Daniele Malesani at Niels Bohr Inst,Dark Cosmology Center <malesani@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.
Looking for U.S. government information and services? Visit USA.gov