IceCube-220425A - IceCube observation of a high-energy neutrino candidate track-like event
Abstract
On 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. After 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: Date: 2022-04-25 Time: 02:44:57.82 UT RA: 268.24 (+1.98, -1.66 deg 90% PSF containment) J2000 Dec: -10.73 (+1.71, -1.48 deg 90% PSF containment) J2000 One 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. The 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
- Publication:
-
GRB Coordinates Network
- Pub Date:
- April 2022
- Bibcode:
- 2022GCN.31944....1I