TITLE:   GCN CIRCULAR
NUMBER:  5819
SUBJECT: Swift-BAT triggers 238544 and 238546 are not GRBs
DATE:    06/11/13 04:23:55 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>

S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU),
K. M. McLean (LANL/UTD), D. C. Morris (PSU), C. Pagani (PSU),
A. M. Parsons (GSFC), J. L. Racusin (PSU), P. Roming (PSU),
M. Stamatikos (NASA/ORAU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 03:53:06 and 04:08:14 UT, the Swift Burst Alert Telescope (BAT)
triggered (238544 and 238546) on Cyg X-1 and GRS 1915 during a period
when the Star Tracker had recently lost lock.  Neither of the triggers
are due to GRBs.