{
  "bibcode": "2018GCN.22958....1G",
  "body": "J.D. Gropp (PSU), J. A. Kennea (PSU), D. M. Palmer (LANL),\nB. Sbarufatti (PSU) and A. Tohuvavohu (PSU) report on behalf of the\nNeil Gehrels Swift Observatory Team:\n\nAt 21:54:34 UT, the Swift Burst Alert Telescope (BAT) found a \nmarginal-significance peak in an untriggered image near the\nline of site to a nearby galaxy (trigger=848621).  \nSwift did not slew to the location due to an observing constraint. \nThe BAT on-board calculated location is \nRA, Dec 190.395, +11.798 which is \n   RA(J2000) = 12h 41m 35s\n   Dec(J2000) = +11d 47' 53\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  As is typical for an image trigger,\nno variation is apparent in the BAT lightcurve. \n\nBAT alerted due to a program of following up marginal detections\nin the vicinity of nearby galaxies.  In this case, the low significance\nof the image peak (5.86 sigma), the lack of a rate trigger, and the \ndistance between the peak and the putative host galaxy (9 arcmin),\nimplies that this is merely a noise peak in image space and\nnot an astrophysical event. \n\nNo further observations are planned.",
  "circularId": 22958,
  "createdOn": 1531951749000,
  "email": "palmer@lanl.gov",
  "subject": "Swift Trigger 848621 is not an astrophysical event",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>"
}