OP 313 flare: Upper limits from a neutrino search with IceCube
ATel #17016; Sam Hori (University of Wisconsin - Madison), Jessie Thwaites (University of Wisconsin - Madison), Justin Vandenbroucke (University of Wisconsin - Madison), Anna Franckowiak (Ruhr-University Bochum)
on 6 Feb 2025; 01:10 UT
Credential Certification: Justin Vandenbroucke (justin.vandenbroucke@wisc.edu)
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 blazar OP 313 in a time window of 45 days around the Fermi-LAT (ATel #16970) and IACT gamma-ray (ATel #16977, ATel #16993, ATel #17000, ATel #17003) detections, during which time IceCube was collecting good quality data (2024-12-20 12:00:00.00 UTC to 2025-02-03 12:00:00.00 UTC). We find that these data are consistent with atmospheric background expectations, with a p-value of 0.028. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 0.11 GeV cm^-2 at 90% CL, under the assumption of an E^-2 power law. 90% of events IceCube would detect from a source at this declination with an E^-2 spectrum have energies in the approximate range 700 GeV to 500 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.
[1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)
