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GCN Circular 6381

Swift-BAT trigger 278809 is not a GRB
2007-05-07T15:45:36Z (17 years ago)
Scott Barthelmy at NASA/GSFC <>
S. D. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/ORAU),
E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/ORAU), G. Sato (ISAS), M. Stamatikos (GSFC),
J. Tueller (GSFC)
on behalf of the Swift-BAT team:

The Swift-BAT trigger (trigger=278809) at 13:24:51 UT on 07 May 2007,
tentatively labelled GRB 070507 (GCN 6380, Vetere et al.),
is not due to a GRB or any other astrophysical source.  This trigger 
is due to a cosmic ray shower event in the instrument.  All 128 events
occurred in the same 100 microsec window.
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