Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 21923

Search for counterpart to IceCube-170922A with ANTARES
2017-09-24T19:34:55Z (7 years ago)
Damien Dornic at CPPM,France <>
D. Dornic (CPPM/CNRS), A. Coleiro (APC/Universite Paris Diderot) on behalf of the ANTARES Collaboration:

Using data from the ANTARES detector, we have performed a follow-up analysis of the recently reported single high-energy (EHE) neutrino IceCube-170922A (AMON IceCube EHE 50579430_130033). The reconstructed origin was 14.2 degrees below the horizon for ANTARES.

No up-going muon neutrino candidate events were recorded within three degrees of the IceCube event coordinates during a +/- 1h time-window centered on the IceCube event time. A search on an extended time window of +/- 1 day has also yielded no detection (46% visibility probability).

This yields a preliminary 90% confidence level upper limit on the muon-neutrino fluence from a point source of 15^-2 over the energy range 3.3 TeV - 3.4 PeV (the range corresponding to 5-95% of the detectable flux) for an E^-2 power-law spectrum, and 34^-2 (450 GeV - 280 TeV) for an E^-2.5 spectrum.

ANTARES is the largest neutrino detector installed in the Mediterranean Sea, and is primarily sensitive to astrophysical neutrinos in the TeV-PeV energy range.  At 10 TeV, the median angular resolution for muon neutrinos is below 0.5 degrees. In the range 1-100 TeV, ANTARES has the best sensitivity to this position in the sky.
Looking for U.S. government information and services? Visit