SGR 1935+2154 bursts: Upper limits from a neutrino search with IceCube
ATel #15701; Abhishek Desai (UW-Madison), Jessie Thwaites (UW-Madison), Justin Vandenbroucke (UW-Madison), Marcos Santander (U. Alabama), Erik Blaufuss (U. Maryland) for the IceCube Collaboration
on 20 Oct 2022; 02:32 UT
Credential Certification: Abhishek Desai (desai25@wisc.edu)
Subjects: Neutrinos, Soft Gamma-ray Repeater, Transient, Magnetar
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
IceCube has performed a search for track-like muon neutrino events arriving from the direction of SGR 1935+2154 (GCN Circular 32675 (INTEGRAL); 32796 (AGILE); ATel #15667, #15672, #15697, #15698) in a time range of 9 days beginning prior to the initial trigger reported by INTEGRAL (2022-10-09 21:28:25.8 UTC to 2022-10-18 21:28:25.8 UTC) during which IceCube was collecting good quality data. Eight muon track-like events are found coincident with the position of SGR 1935+2154 during this time period. We find that these data are consistent with atmospheric background expectations, with a p-value of 0.05. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 5.2 x 10^-2 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 energy range between 800 GeV and 850 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)
