Nova V1935 Cen: Upper limits from a neutrino search with IceCube
ATel #17477; Alicia Mand (University of Wisconsin-Madison), Anna Franckowiak (Ruhr-University Bochum), Erik Blaufuss (University of Maryland), Justin Vandenbroucke (University of Wisconsin-Madison)
on 5 Nov 2025; 19:24 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 nova V1935 Cen (ATel #17414, ATel #17459) in a time range of four days (2025-09-19 12:00:00.00 UTC to 2025-09-23 12:00:00.00 UTC), during which IceCube was collecting good quality data. Zero track-like events are found in spatial coincidence with V1935 Cen during this time period, resulting in a p-value of 1.0 with respect to an atmospheric background-only hypothesis. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/dE = 8.0 x 10^-1 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 are between approximately 100 TeV and 2 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.
[1] IceCube Collaboration, R. Abbasi et al., ApJ 910 4 (2021)
