[vsnet-grb-info 22755] IceCube-190619A - IceCube observation of a high-energy neutrino candidate event
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Jun 20 00:38:23 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 24854
SUBJECT: IceCube-190619A - IceCube observation of a high-energy neutrino candidate event
DATE: 19/06/19 15:37:27 GMT
FROM: Erik Blaufuss at U. Maryland/IceCube <blaufuss at umd.edu>
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
On 19/06/19 at 13:14:18.04 UT IceCube detected a track-like event with a
high probability of being of astrophysical origin. The event was
selected by the ICECUBE_Astrotrack_Gold alert stream. The average
astrophysical neutrino purity for Gold alerts is 50%. This alert has an
estimated false alarm rate of 0.98 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/132707_54984442.amon), more
sophisticated reconstruction algorithms have been applied offline, with
the direction refined to:
Date: 19/06/19
Time: 13:14:18.04 UT
RA: 343.26 (+ 4.08 - 2.63 deg 90% PSF containment) J2000
Dec: 10.73 (+ 1.51 - 2.61 deg 90% PSF containment) J2000
We encourage follow-up by ground and space-based instruments to help
identify a possible astrophysical source for the candidate neutrino.
There are no Fermi 4FGL or 3FHL catalog sources in the 90% uncertainty
region. The nearest gamma-ray source in either catalog is 4FGL
J2252.6+1245 at RA: 343.17 deg, Dec: 12.75 deg (2.73 deg away from the
best-fit event 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 at icecube.wisc.edu
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