{
  "bibcode": "2010GCN.10663....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC), E. A. Hoversten (PSU), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC)\n(for the Swift-BAT team):\n \nUsing the data set from T-60 to T+243 sec from recent telemetry downlinks,\nwe report further analysis of BAT trigger #420256 (Hoversten, et al.,\nGCN Circ. 10654).\n \nThe mask-weighted light curve shows a very weak peak (roughly 5.5 sigma\nsignificance) starting at T_zero and ending at T+65 sec.  The spectrum is soft\n(simple powerlaw index of 2.89 +- 0.56).\n\nGiven the weak detection and the lack of an XRT detection (Circ 10654),\nwe believe this trigger is not astrophysical.  However, we can not rule out\na burst or even a galactic origin.",
  "circularId": 10663,
  "createdOn": 1272056588000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "Swift-BAT refined analysis of trigger 420256",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>"
}