{
  "bibcode": "2022GCN.31944....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2022-04-25 at 02:44:57.82 UT IceCube detected a track-like event which was selected by the ICECUBE_Astrotrack_GOLD alert stream. We note that, while the average astrophysical neutrino purity for Gold alerts is 50%, this event has a lower probability (~17%). This alert has an estimated false alarm rate of 0.576 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/136568_17854328.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2022-04-25\nTime:  02:44:57.82 UT\nRA: 268.24 (+1.98, -1.66 deg  90% PSF containment) J2000\nDec: -10.73 (+1.71, -1.48 deg 90% PSF containment) J2000\n\nOne gamma-ray source listed in the 4FGL-DR3 Fermi-LAT catalog is located within the 90% containment region for the neutrino event. The source is 4FGL J1752.6-1010 (RA: 268.16 deg, Dec: -10.18 deg J2000), 0.56 deg away from the best-fit neutrino candidate position.\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",
  "circularId": 31944,
  "createdOn": 1650859720000,
  "email": "jmsantander@ua.edu",
  "subject": "IceCube-220425A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Marcos Santander at U. Alabama/IceCube  <jmsantander@ua.edu>",
  "eventId": "IceCube-220425A"
}