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 14825

Swift Trigger 557674 was due to an onboard position error
2013-06-08T15:53:10Z (11 years ago)
Jay R. Cummings at NASA/GSFC/Swift <>
J. R. Cummings (UMBC/CRESST/GSFC) reports on behalf of the Swift team:

The probable new Galactic transient reported in GCN Circular # 14821 was not
a new source. It was a known source (4U 1700-377) reported in an incorrect
position.  The cause of the error of ~0.4 degrees is not yet known.  The
Swift star tracker was correctly locked during the observation and the source
was found in the correct position in all image sub-intervals that made up the
summed image interval that resulted in the erroneous report.  We regret any
Looking for U.S. government information and services? Visit