TITLE:   GCN CIRCULAR
NUMBER:  4059
SUBJECT: Swift-BAT triggers 158261 and 158262 Retraction
DATE:    05/10/04 11:44:50 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <Scott@lheamail.gsfc.nasa.gov>

P. Romano (OAB), S. Barthelmy (GSFC), D. Burrows (PSU),
N. Gehrels (GSFC), S. Hunsberger (PSU), J. Kennea (PSU),
C. Markwardt (GSFC-UMd), A. Moretti (OAB), K. Page (U. Leicester),
D. Palmer (LANL),
On behalf of the Swift Team:

Swift-BAT triggers 158261 and 158262 Retraction

Beginning at 11:01:44 UT Swift-BAT triggered incorrectly twice
(triggers 158261 and 158262). These are not GRBs and are due
to temporary loss of lock in the star tracker.  Further GCN/Swift  
alerts will be blocked until the star tracker is re-initialized.