{
  "submittedHow": "email-legacy",
  "subject": "IceCube-231014A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Marcos Santander at U of Alabama <jmsantander@ua.edu>",
  "eventId": "IceCube-231014A",
  "circularId": 34817,
  "bibcode": "2023GCN.34817....1I",
  "createdOn": 1697325575165,
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2023-10-14 at 22:00:06.27 UT IceCube detected a track-like event with a high probability of being of astrophysical origin. The event was selected by the ICECUBE_Astrotrack_BRONZE alert stream. The average astrophysical neutrino purity for Bronze alerts is 30%. This alert has an estimated false alarm rate of 4.853 events per year due to atmospheric backgrounds. The IceCube detector was in a normal operating state at the time of detection.\n\nAfter the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon_g_b/138449_20481611.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2023-10-14\nTime:  22:00:06.27 UT\nRA: 297.16 (+2.73 / -4.32 deg  90% PSF containment) J2000\nDec: +1.34 (+1.24 / -1.11 deg 90% PSF containment) J2000\n\nWe encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino.\n\nTwo Fermi 4FGL-DR4 sources are located in the 90% uncertainty region of the event. The sources are 4FGL J1947.0+0031 at RA = 296.76 deg, Dec = +0.52 and 4FGL J1955.7+0214 at RA = 298.94 deg, Dec = +2.24, located 0.91 and 1.99 deg away from the best fit position, respectively.\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu\n\n\n"
}