Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New! October 18 GCN Classic Outage and Schema v4.2.0. See news and announcements

GCN Circular 2996

Subject
GRB050126: Updated Swift XRT Position
Date
2005-01-28T19:34:04Z (20 years ago)
From
Gianpiero Tagliaferri at OAB-INAF <taglia@merate.mi.astro.it>
S. Campana, G. Chincarini, A. Moretti, C. Pagani, P. Romano,  G. 
Tagliaferri (OAB),
D. N. Burrows, J. E. Hill, J. A. Kennea, D. Morris, J. A. Nousek (PSU),
M. Capalbi, P. Giommi, M. Perri,  (ASDC/ASI), G. Cusumano, V. Mangano 
(IASF/Pa),
J. Osborne, K. Page, M. Goad, A. Beardmore, A. Wells (U. Leicester),  N. 
Gehrels,
N. White, L. Angelini,  F. Marshall (NASA/GSFC), K. McGowan, K. Mason 
(MSSL)
report on behalf of the Swift XRT team:

We have obtained a new XRT position, using the ground-based pipeline
processing software, including stellar aberration correction.  The analysis
is based on 4 different orbits and the source is detected each time. 
Although
in the last orbits we have only few counts the derived coordinates are very
consistent and differ by less than 5 arcseconds.

The new position for the X-ray afterglow is:

RA(J2000) = 18:32:27.0,
Dec(J2000) = +42 22 13.5

We estimate a remaining uncertainty of about 8 arcseconds, including a
systematic error of about 5 arcseconds due to residual alignment offsets
that have not been fully calibrated yet.
Looking for U.S. government information and services? Visit USA.gov