{
  "subject": "GRB 260120B: Swift detection of a burst",
  "body": "M. Ferro (INAF-OAB), R. Gupta (NASA GSFC), A. Y. Lien (U Tampa),\nK. L. Page (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU)\nreport on behalf of the Neil Gehrels Swift Observatory Team:\n\nAt 18:00:26 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 260120B (trigger=1442454).  Swift slewed immediately to the burst.\nThe BAT on-board calculated location is \nRA, Dec 284.666, +61.912 which is \n   RA(J2000) = 18h 58m 40s\n   Dec(J2000) = +61d 54' 42\"\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 10 sec.  The peak count rate\nwas ~1700 counts/sec (15-350 keV), at ~1 sec after the trigger.\n\nThe XRT began observing the field at 18:02:51.6 UT, 145.5 seconds after\nthe BAT trigger. No source was detected in the 2.5-s promptly available\nimage. We are waiting for the full dataset to detect and localise the\nXRT counterpart.\n\nNo UVOT data are available at this time.\n\nBurst Advocate for this burst is M. Ferro (matteo.ferro AT inaf.it).\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",
  "createdOn": 1768932991603,
  "submitter": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
  "circularId": 43479,
  "submittedHow": "email",
  "eventId": "GRB 260120B",
  "bibcode": "2026GCN.43479....1F"
}