{
  "bibcode": "2016GCN.19430....1B",
  "body": "S. D. Barthelmy (GSFC), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC),\nF. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),\nT. G. R. Roegiers (PSU) and T. N. Ukwatta (LANL) report on behalf of\nthe Swift Team:\n\nAt 20:49:46 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated SGR 1935+2154  (trigger=686443).  Swift slewed immediately to the source.\nThe BAT on-board calculated location is\nRA, Dec 293.704, +21.880, which is\n   RA(J2000)  =  19h 34m 49s\n   Dec(J2000) = +21d 52' 48\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including\nsystematic uncertainty).  The BAT light curve shows a single spike\nstructure with a total duration less than 128 msec.  The peak count rate\nwas ~3600 counts/sec (15-350 keV), at ~0 sec after the trigger.\n\nThe XRT began observing the field at 20:51:05.0 UT, 78.1 seconds after\nthe BAT trigger. No source was detected in 157 s of promptly downlinked\ndata. We are waiting for the full dataset to detect and localise the\nXRT counterpart.\n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 83 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 large, but uncertain extinction expected.",
  "circularId": 19430,
  "createdOn": 1463432609000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "Trigger 686443: Swift detection of SGR 1935+2154",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "SGR 1935+2154"
}