TITLE: GCN CIRCULAR
SUBJECT: Swift Trigger 28742: False trigger due to star tracker loss
DATE: 07/08/10 20:29:15 GMT
FROM: David Palmer at LANL email@example.com
P. J. Brown (PSU), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), C. Guidorzi (Univ Bicocca&INAF-OAB), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU), G. Sato (GSFC/ISAS) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team:
At 19:54 UT, Swift suffered a loss of star tracker lock, and the Burst Alert Telescope (BAT) then interpreted Sco X-1 as a GRB (trigger=287421).
The BAT position notice correctly contained the comment line:
COMMENTS: This trigger occured while the StarTracker had lost lock, so it is possibly bogus.
Star tracker recovery is currently underway.