Nova V6598 Sgr 2023: Upper limits from a neutrino search with IceCube
ATel #16163; Jessie Thwaites (University of Wisconsin-Madison), Justin Vandenbroucke (University of Wisconsin-Madison), Marcos Santander (University of Alabama)
on 31 Jul 2023; 05:55 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 classical nova V6598 Sgr 2023 detected in the optical band by A. Pearce and Y. Nakamura (CBET 5278) and in gamma rays at significance >4 sigma by Fermi-LAT (ATel #16151) with a time window of 15 days (2023-07-14 12:00:00.0 UTC to 2023:07:29 12:00:00.0 UTC), during which IceCube was producing good quality data.
For this search, we report a p-value of 1.0, consistent with background expectation. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 3.1 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 have energies between approximately 60 TeV and 20 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)
