{
  "bibcode": "2006GCN..5313....1K",
  "body": "H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),\nM. Capalbi (ASDC), M.L. Conciatore (ASDC), J. R. Cummings (NASA/UMD),\nC. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB),\nJ. A. Kennea (PSU), K. M. McLean (LANL/UTD), D. M. Palmer (LANL),\nM. Perri (ASDC), P. Romano (INAF-OAB), M. Stamatikos (NASA/ORAU) and\nL. Vetere (ASDC) report on behalf of the Swift Team:\n\nAt 17:26:13 UT, the Swift Burst Alert Telescope (BAT) triggered on \nwhat is probably a cosmic ray particle event.  However until we \nreceive the full BAT event data set (in over three hours) we cannot\ndefinitively rule out this being a short GRB.  \nThe BAT on-board calculated location is \nRA,Dec 279.037,-42.733  {18h 36m 09s, -42d 43' 57\"} (J2000)\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  This is a weak event and the currently available \nBAT light curve does not show much structure. \n\nBecause of an Earth limb constraint, the spacecraft did not slew promptly\nto the BAT position, and so there are no immediate XRT and UVOT data products\nto analyze. The field will become visible to the Narrow Field Instruments\nat 18:28 UT.",
  "circularId": 5313,
  "createdOn": 1152899518000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "Swift trigger 219136 is probably not a GRB",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>"
}