{
  "subject": "Swift Trigger 1218701: Yes, we triggered on Swift J151857.0-572147 again",
  "bibcode": "2024GCN.35868....1K",
  "circularId": 35868,
  "createdOn": 1709612602729,
  "submitter": "Jamie Kennea at Penn State <jak51@psu.edu>",
  "body": "\nJ. A. Kennea (PSU) and A. Y. Lien (U Tampa) report on behalf of the\nNeil Gehrels Swift Observatory Team:\n\nAt 04:13:42 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated Swift J151857.0-572147 (trigger=1218701).  \nSwift slewed immediately to the source. \nThe BAT on-board calculated location is \nRA, Dec 229.705, -57.343 which is \n   RA(J2000) = 15h 18m 49s\n   Dec(J2000) = -57d 20' 32\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  As is usual with an image trigger, the BAT light curve\ndoes not show anything significant. \n\nThe XRT began observing the field at 04:16:16.1 UT, 153.2 seconds after\nthe BAT trigger. XRT found a bright, uncatalogued X-ray source located\nat RA, Dec 229.7317, -57.3641 which is equivalent to:\n   RA(J2000)  = 15h 18m 55.61s\n   Dec(J2000) = -57d 21' 50.8\"\nwith an uncertainty of 5.9 arcseconds (radius, 90% containment). This\nlocation is 91 arcseconds from the BAT onboard position, within the BAT\nerror circle. No event data are yet available to determine the column\ndensity using X-ray spectroscopy. \n\n",
  "submittedHow": "email"
}