Back

GCN Circular 4389

Subject

GRB 051221A: Chandra Afterglow Position

Date

2005-12-23T07:14:20Z (19 years ago)

From

Dirk Grupe at PSU/Swift-XRT <grupe@astro.psu.edu>

GRB 051221A: Chandra Afterglow Position

D. Grupe (PSU), D. N. Burrows (PSU), and S. Patel (NASA/MSFC) report on 
behalf of a larger collaboration:

We executed a Chandra ToO observation of GRB 051221A beginning at 2005-12-22
13:55:20 UT  (130 ks after the burst) and lasting for 30.2 ks.  A fading 
X-ray source was found within the XRT error circle (Burrows et al., GCN 
4366Not found
 
 
) at

   RA(J2000)  =  21:54:48.626
   Dec(J2000) = +16:53:27.16

Chandra positions have typical uncertainties of 0.5 arcseconds 
(radius).  This
position is 0.55 arcseconds from the optical counterpart identified by 
Bloom et al. (GCN 4368Not found
 
 
)
and 0.34 arcseconds from the position reported by Berger (GCN 4369Not found
 
 
)