[vsnet-grb-info 16616] Swift Triggers 642296 and 642297 are not GRBs

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17897
SUBJECT: Swift Triggers 642296 and 642297 are not GRBs
DATE:    15/06/02 11:11:58 GMT
FROM:    David Palmer at LANL  <palmer at lanl.gov>

P. A. Evans (U Leicester), K. L. Page (U Leicester) and
D. M. Palmer (LANL) report on behalf of the Swift Team:

At 10:37:38 UT, the Swift Burst Alert Telescope (BAT) had lost
star-tracker lock. 

As a result trigger 642296 and subsequent triggers are due to
misidentifying known sources as new GRBs. 

The Flight Operations Team has been called in.