{
  "bibcode": "2012GCN.14119....1C",
  "body": "J. K. Cannizzo (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC),\nV. D'Elia (ASDC), H. A. Krimm (CRESST/GSFC/USRA),\nF. E. Marshall (NASA/GSFC), T. Sakamoto (AGU), M. H. Siegel (PSU) and\nE. Sonbas (NASA/GSFC/Adiyaman Univ.) report on behalf of the Swift\nTeam:\n\nAt 12:51:51 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated trigger=544381, which is possibly, but unlikely to be, a GRB.  \nSwift slewed immediately to the trigger location. The BAT on-board \ncalculated location is \nRA, Dec 185.493, -47.928 which is \n   RA(J2000) = 12h 21m 58s\n   Dec(J2000) = -47d 55' 39\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed weak\nstructure superimposed on a rising count rate due to entry into the South \nAtlantic Anomaly.  This, combined with the low image significance \n(6.8-sigma) makes this trigger unlikely to be a burst.  However,\nfurther analysis of the full BAT data is required to make a final \ndetermination. \n\nThe XRT began observing the field at 12:52:41.4 UT, 49.8 seconds after\nthe BAT trigger. No source was detected in the 2.5-s promptly available\nimage. We are waiting for the full dataset to detect and localise the possible\nXRT counterpart. \n\nFull XRT and UVOT products are not available at this time because\nSwift entered the South Atlantic Anomaly shortly after the BAT\ntrigger. \n\nBurst Advocate for this burst is J. K. Cannizzo (cannizzo AT milkyway.gsfc.nasa.gov). \nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/too.html.)",
  "circularId": 14119,
  "createdOn": 1356787564000,
  "email": "siegel@swift.psu.edu",
  "subject": "Swift Trigger 544381 is unlikely to be a GRB",
  "submitter": "Mike Siegel at PSU/Swift MOC  <siegel@swift.psu.edu>"
}