IceCube-220625A - IceCube observation of a high-energy astrophysical neutrino candidate event
ATel #15472; Marcos Santander (Univ of Alabama) for the IceCube Collaboration
on 25 Jun 2022; 17:32 UT
Credential Certification: Marcos Santander (jmsantander@ua.edu)
Referred to by ATel #: 15490
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
On 2022-06-25 at 14:14:38.53 UT IceCube detected a cascade-like event with a high probability of being of astrophysical origin (p ~ 0.9). The event was selected by the ICECUBE_CASCADE alert stream. The IceCube detector was in a normal operating state at the time of detection.
The online reconstruction of the event yields the following directional information (in J2000 coordinates):
RA: 179.39 deg
Dec: -4.16 deg
Localization uncertainty radius (at 90% containment): 5.86 deg
Additional information regarding this alert is provided in the initial GCN Notice and a HEALPix localization skymap is available in the GCN IceCube Cascade Alert webpage. The high energy of this candidate neutrino event (preliminary estimate: 480 TeV) makes it one of the highest energy cascade events detected by IceCube in recent years. We therefore encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino.
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.
