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GCN Circular 33907

LIGO/Virgo/KAGRA S230518h: Upper limits from a two-week IceCube neutrino search
2023-06-02T22:04:10Z (a year ago)
Jessie Thwaites at IceCube/U Wisc-Madison <>
IceCube Collaboration ( reports:

IceCube has performed an additional search [1] for track-like muon neutrino events consistent with the sky localization of gravitational-wave candidate S230518h in a time range of -0.1 day, +14 days from the alert event time (2023-05-18 10:35:08.016 UTC to 2023-06-01 12:59:08.016 UTC). 

During this time period IceCube was collecting good quality data. In this case, we report a p-value of 0.73, consistent with no significant excess of track events. IceCube's sensitivity assuming an E^-2 spectrum (E^2 dN/dE) to neutrino point sources within the locations spanned by the 90% spatial containment of the 4-Update map ranges from 0.028 to 1.219 GeV cm^-2 in this time window.

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 

[1] Abbasi et al. Astrophys.J. 944 (2023) 1, 80

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