{
  "bibcode": "2024GCN.35461....1G",
  "submitter": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
  "circularId": 35461,
  "subject": "GRB 240102A: Swift detection of a burst",
  "submittedHow": "email",
  "createdOn": 1704219567895,
  "eventId": "GRB 240102A",
  "body": "\nJ.D. Gropp (PSU), S. Dichiara (PSU), J. A. Kennea (PSU),\nK. L. Page (U Leicester) and M. A. Williams (PSU) report on behalf of\nthe Neil Gehrels Swift Observatory Team:\n\nAt 17:34:55 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 240102A (trigger=1205899). Swift slewed immediately to the \nburst. The BAT on-board calculated location is \nRA, Dec 96.846, -20.024 which is \n   RA(J2000) = 06h 27m 23.0s\n   Dec(J2000) = -20d 01' 26.4\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty). We currently have no information regarding the\nBAT light-curve. \n\nThe XRT began observing the field at 17:37:00.6 UT, 125 seconds\nafter the BAT trigger. Using promptly downlinked data we find an\nuncatalogued X-ray source with an enhanced position: RA, Dec 96.83800,\n-20.04076 which is equivalent to:\n   RA(J2000)  = 06h 27m 21.12s\n   Dec(J2000) = -20d 02' 26.7\"\nwith an uncertainty of 1.9 arcseconds (radius, 90% containment). This \nposition is 66 arc-seconds from the BAT localization. This\nposition may be improved as more data are received; the latest position\nis available at https://www.swift.ac.uk/sper. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density consistent with the Galactic value of 2.34\nx 10^21 cm^-2 (Willingale et al. 2013). \n\nNo afterglow is detected in the initial UVOT data products. \n\nBurst Advocate for this burst is J.D. Gropp (jdg44 AT psu.edu). \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"
}