[vsnet-grb-info 22882] IceCube-190704A - IceCube observation of a high-energy neutrino candidate event
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Jul 5 05:50:55 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 24981
SUBJECT: IceCube-190704A - IceCube observation of a high-energy neutrino candidate event
DATE: 19/07/04 20:49:46 GMT
FROM: Marcos Santander at U. Alabama/IceCube <jmsantander at ua.edu>
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
On 19/07/04 at 18:48:52.25 UT IceCube detected a track-like event with a moderate probability of being of astrophysical origin. The event was selected by the ICECUBE_Astrotrack_Bronze alert stream. The average astrophysical neutrino purity for Bronze alerts is 30%. This alert has an estimated false alarm rate of 1.00 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/gcn/notices_amon_g_b/132792_60166398.amon), more
sophisticated reconstruction algorithms have been applied offline, with the direction refined to:
Date: 19/07/04
Time: 18:48:52.25 UT
RA: 161.85 (+2.16 -4.33 deg 90% PSF containment) J2000
Dec: 27.11 (+1.81 -1.83 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 is one unassociated Fermi 4FGL source lying within the 50% uncertainty region, 4FGL J1049.8+2741, at RA: 162.46 deg, Dec: 27.68 deg (0.8 deg away from the best-fit event position). There are no other Fermi 3FHL or 4FGL catalogue sources within the 90% contour.
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<mailto:roc at icecube.wisc.edu>
_______________________________
Marcos Santander
Assistant Professor
Department of Physics & Astronomy
317B Gallalee Hall
University of Alabama
Tuscaloosa, AL 35487
+1 (205) 348 4863
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