1ES 1959+650: Upper limits from a neutrino search with IceCube
ATel #16959; Anna Franckowiak (Ruhr-University Bochum), Alicia Mand (University of Wisconsin - Madison), Sam Hori (University of Wisconsin - Madison), Marcos Santander (University of Alabama - Tuscaloosa)
on 23 Dec 2024; 10:38 UT
Credential Certification: Anna Franckowiak (anna.franckowiak@desy.de)
Referred to by ATel #: 16978
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
IceCube has performed a search for track-like muon neutrino events arriving from the direction of the TeV blazar 1ES 1959+650, which is in an ongoing flaring state detected in X-rays by SVOM and Swift (ATel #16935, Atel #16941, ATel #16955) and VHE gamma-rays by MAGIC (ATel #16939). The search was performed using a time window of 20 days (2024-12-01 12:00:00.0 UTC to 2024-12-21 12:00:00.0 UTC) to capture the current flaring period, during which IceCube was collecting good quality data.
We find that the data are consistent with atmospheric background expectations, with a p-value of 1.0. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 1.0 x 10^-1 GeV cm^-2 at 90% CL, under the assumption of an E^-2 power law. The central 90% energy range of events IceCube would detect from a source at this declination with an E^-2 spectrum is approximately 500 GeV to 140 TeV.
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.
