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 21305

Trigger 760835: Swift misidentification of GRS1716-249
2017-07-08T03:15:52Z (7 years ago)
David Palmer at LANL <>
A. Cholden-Brown (PSU), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC),
K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of
the Swift Team:

For an image beginning at 03:34:04 UT, BAT misidentified the
known source GRS 1716-249 as a different source
and incorrectly triggered an alert. 

This is due to a known race condition in the onboard software. 

The flux level of GRS 1716-249 in this detection is consistent
with recent observations of this source, which has been in outburst 
since December 2016 and has declined to ~40% of its peak value.
Looking for U.S. government information and services? Visit