{
  "bibcode": "2016GCN.20087....1S",
  "body": "M. Stamatikos (OSU/NASA/GSFC), S. D. Barthelmy (GSFC),\nJ. A. Kennea (PSU), F. E. Marshall (NASA/GSFC),\nK. L. Page (U Leicester), D. M. Palmer (LANL) and T. N. Ukwatta (LANL)\nreport on behalf of the Swift Team:\n\nAt 02:43:40 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 161022A (trigger=718655).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 128.967, +54.365 which is \n   RA(J2000)  =  08h 35m 52s\n   Dec(J2000) = +54d 21' 54\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows a single peak\nwith a duration of about 20 sec.  The peak count rate\nwas ~1200 counts/sec (15-350 keV), at ~2 sec after the trigger. \n\nThe XRT began observing the field at 02:45:53.4 UT, 133.3 seconds after\nthe BAT trigger. Using promptly downlinked data we find an uncatalogued\nX-ray source located at RA, Dec 129.00074, 54.34876 which is equivalent\nto:\n   RA(J2000)  = 08h 36m 00.18s\n   Dec(J2000) = +54d 20' 55.5\"\nwith an uncertainty of 3.5 arcseconds (radius, 90% containment). This\nlocation is 91 arcseconds from the BAT onboard position, within the BAT\nerror circle. This position may be improved as more data are received;\nthe latest position is available at http://www.swift.ac.uk/sper. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density in excess of the Galactic value (4.13 x\n10^20 cm^-2, Willingale et al. 2013), with an excess column of 1.2\n(+1.30/-1.19) x 10^21 cm^-2 (90% confidence). \n\nNo UVOT data are available at this time. \n\nBurst Advocate for this burst is M. Stamatikos (Michael.Stamatikos-1 AT 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": 20087,
  "createdOn": 1477105417000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "GRB 161022A: Swift detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 161022A"
}