{
  "body": "R. A. J. Eyles-Ferris (U Leicester), J. A. Kennea (PSU),\nH. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL), K. L. Page (U Leicester)\nand B. Sbarufatti (INAF-OAB) report on behalf of the Neil Gehrels\nSwift Observatory Team:\n\nAt 11:40:26 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 260114A (trigger=1440319).  Swift slewed immediately to the burst.\nThe BAT on-board calculated location is \nRA, Dec 74.602, -7.994 which is \n   RA(J2000) = 04h 58m 25s\n   Dec(J2000) = -07d 59' 37\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single-peaked\nstructure with a duration of about 0.5 sec.  The peak count rate\nwas ~16000 counts/sec (15-350 keV), at ~0 sec after the trigger.\n\nThe XRT began observing the field at 11:42:28.4 UT, 122.2 seconds after\nthe BAT trigger. Using promptly downlinked data we find an uncatalogued\nX-ray source with an enhanced position: RA, Dec 74.59830, -8.01433\nwhich is equivalent to:\n   RA(J2000)  = 04h 58m 23.59s\n   Dec(J2000) = -08d 00' 51.6\"\nwith an uncertainty of 3.3 arcseconds (radius, 90% containment). This\nlocation is 74 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 https://www.swift.ac.uk/sper.  We\ncannot determine whether the source is fading at the present time. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density consistent with the Galactic value of 5.72\nx 10^20 cm^-2 (Willingale et al. 2013).\n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 126 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 100% of\nthe XRT 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\nXRT 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\n0.080.\n\nBurst Advocate for this burst is R. A. J. Eyles-Ferris (raje1 AT leicester.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/)\n\n",
  "submittedHow": "email",
  "createdOn": 1768391728048,
  "circularId": 43396,
  "submitter": "Rob Eyles-Ferris at U of Leicester <raje1@leicester.ac.uk>",
  "bibcode": "2026GCN.43396....1E",
  "eventId": "GRB 260114A",
  "subject": "GRB 260114A: Swift detection of a short burst"
}