{
  "bibcode": "2011GCN.12109....1B",
  "body": "W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),\nV. D'Elia (ASDC), P. A. Evans (U Leicester), C. Gronwall (PSU),\nC. Guidorzi (U Ferrara), E. A. Hoversten (PSU),\nO. M. Littlejohns (U Leicester), V. Mangano (INAF-IASFPA),\nK. L. Page (U Leicester), J. L. Racusin (NASA/GSFC),\nP. Romano (INAF-IASFPA) and B. Sbarufatti (INAF-OAB/IASFPA) report on\nbehalf of the Swift Team:\n\nAt 07:48:43 UT, the Swift Burst Alert Telescope (BAT) triggered on\ntrigger=456780.  Swift slewed immediately to the location. \nThe BAT on-board calculated location is \nRA, Dec 22.861, +16.758 which is \n   RA(J2000) = 01h 31m 27s\n   Dec(J2000) = +16d 45' 29\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a rapidly rising \nbackground as the spacecraft entered the SAA.  In addition to the fact\nthat the image significance was less than the 7 sigma canonical threshold, \nthis trigger is not a burst. \n\nThe XRT began observing the field at 07:49:44.2 UT, 60.9 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\nXRT counterpart. \n\nNo prompt UVOT data products were received.  We are waiting for the\nfull dataset to search for a UVOT counterpart. \n\nBurst Advocate for this burst is W. H. Baumgartner (wayne 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": 12109,
  "createdOn": 1310026094000,
  "email": "wayne@milkyway.gsfc.nasa.gov",
  "subject": "Swift trigger 456780 is not a burst",
  "submitter": "Wayne Baumgartner at GSFC  <wayne@milkyway.gsfc.nasa.gov>"
}