PSR B1259-63/LS 2883: Upper limits from a neutrino search with IceCube
ATel #16778; Samuel Hori (University of Wisconsin-Madison), Justin Vandenbroucke (University of Wisconsin-Madison), Marcos Santander (University of Alabama-Tuscaloosa)
on 17 Aug 2024; 06:02 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 PSR B1259-63/LS 2883 binary system (ATel #16656, 16747). The search was performed using a time window of 66 days (2024-06-02 12:00:00.0 UTC to 2024-08-07 12:00:00.0 UTC), during which IceCube was collecting good quality data. This time window captures both the pre- and post-periastron flares detected by Fermi-LAT.
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 = 9.8 x 10^-1 GeV cm^-2 at 90% CL, under the assumption of an E^-2 power law. The central 90% energy range of events IceCube would detect from a source at this declination with an E^-2 spectrum is approximately 100 TeV to 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.
