{
  "bibcode": "2017GCN.20972....1B",
  "body": "S. D. Barthelmy (GSFC), P. D'Avanzo (INAF-OAB),\nA. Y. Lien (GSFC/UMBC), A. Melandri (INAF-OAB),\nK. L. Page (U Leicester) and B. Sbarufatti (INAF-OAB/PSU) report on\nbehalf of the Swift Team:\n\nAt 10:33:41 UT, the Swift Burst Alert Telescope (BAT) triggered on noise\nnear NGC 5195 (trigger=745090).  Swift slewed immediately to the location. \nThe BAT on-board calculated location is \nRA, Dec 202.405, +47.358, which is \n   RA(J2000)  =  13h 29m 37s\n   Dec(J2000) = +47d 21' 27\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  As is typical for image triggers, the real-time\nlight curve does not show anything significant.  This is a low-significance\ntrigger (6.24 sigma) on noise in the on-board image near NGC 5195.  It is not\nan astrophysical event. \n\nThe XRT began observing the field at 10:36:10.0 UT, 149.0 seconds after\nthe BAT trigger. No source was detected in 575 s of promptly downlinked\ndata. \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 153 seconds after the BAT trigger. No credible afterglow candidate has\nbeen found in the initial data products. The 2.7'x2.7' sub-image covers 25% of\nthe BAT error circle. The typical 3-sigma upper limit has been about 19.6 mag. \nThe 8'x8' region for the list of sources generated on-board covers 100% of the\nBAT error circle. The list of sources is typically complete to about 18 mag. No\ncorrection has been made for the expected extinction corresponding to E(B-V) of\n0.03.",
  "circularId": 20972,
  "createdOn": 1491130407000,
  "email": "boris.sbarufatti@brera.inaf.it",
  "subject": "Swift Trigger 745090 is a noise trigger near NGC 5195",
  "submitter": "Boris Sbarufatti at INAF-OAB/IASFPA  <boris.sbarufatti@brera.inaf.it>"
}