Nova Herculis 2021 (TCP J18573095+1653396): IceCube neutrino search
ATel #14713; Justin Vandenbroucke (University of Wisconsin)
on 14 Jun 2021; 20:29 UT
Credential Certification: Justin Vandenbroucke (justin.vandenbroucke@wisc.edu)
Subjects: Neutrinos, Nova
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 very fast Nova Herculis 2021 (TCP J18573095+1653396) (ATel#14704), which was also detected as a GeV gamma-ray source by Fermi-LAT (ATel#14705 and ATel#14707). The search was performed using a time window two days in duration which covered the time of the observed optical peak (2021-06-12 00:00:00 UTC to 2021-06-13 00:00:00 UTC), 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 = 4.1 x 10^-5 TeV 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 are between approximately 800 GeV and 1 PeV.
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.
