Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 3380

GRB 050509a: Swift XRT Position
2005-05-09T04:33:55Z (19 years ago)
Jamie A. Kennea at PSU/Swift-XRT <>
J. A. Kennea, D. N. Burrows (PSU), C. P. Hurkett, E. Rol (U. Leicester) 
and N. Gehrels (NASA/GSFC) report on behalf of the Swift XRT team:

The Swift BAT instrument detected GRB 050509a at 01:46:28 UT on 9th May 
2005 (GCN Circ 3379). The observatory executed an automated slew to the 
BAT position and the XRT began taking data at 01:47:22 UT. The XRT was in 
Auto state but was not able to centroid on the afterglow due to low source 
intensity. From downlinked data we find a uncatalogued X-ray source 
located at:

RA(J2000) = 20:42:19.7,
Dec(J2000) = +54:04:16.2

We estimate an uncertainty of about 6 arcseconds radius (90% containment). 
This position is 13 arcseconds from the BAT position reported in GCN 3379.
Looking for U.S. government information and services? Visit