{
  "bibcode": "2019GCN.26072....1B",
  "body": "A. P. Beardmore (U Leicester), J.D. Gropp (PSU), J. A. Kennea (PSU),\nK. L. Page (U Leicester), B. Sbarufatti (PSU), M. H. Siegel (PSU) and\nA. Tohuvavohu (Toronto) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 02:46:47 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 191025A (trigger=931384).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 320.755, -48.330 which is \n   RA(J2000) = 21h 23m 01s\n   Dec(J2000) = -48d 19' 46\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty). The significance is relatively low in both \nthe rate and image domains. \n\nThe XRT began observing the field at 02:48:08.9 UT, 82.0 seconds after\nthe BAT trigger. No source was detected in 1.5 ks of promptly\ndownlinked data. We are waiting for the full dataset to detect and\nlocalise the XRT counterpart. \n\nUVOT took a finding chart exposure of 150 seconds with the White\nfilter  starting 85 seconds after the BAT trigger. No credible\nafterglow candidate has  been found in the initial data products. The\n2.7'x2.7' sub-image covers 25% of  the BAT error circle. The typical\n3-sigma upper limit has been about 19.6 mag.  The 8'x8' region for the\nlist of sources generated on-board covers 100% of the  BAT error\ncircle. The list of sources is typically complete to about 18 mag.  No\ncorrection has been made for the expected extinction corresponding to\nE(B-V)  of 0.03. \n\nDue to the low significance of the BAT trigger and the lack of immediate\ncounterpart detection in the XRT or UVOT, the Swift team will not be able to\nconfirm or deny whether this event is a GRB without further data. \n\nBurst Advocate for this burst is A. P. Beardmore (apb AT star.le.ac.uk). \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/)",
  "circularId": 26072,
  "createdOn": 1571973790000,
  "email": "klp5@leicester.ac.uk",
  "subject": "Swift Trigger 931384: possible GRB 191025A",
  "submitter": "Kim Page at U.of Leicester  <klp5@leicester.ac.uk>",
  "eventId": "GRB 191025A"
}