1ES 1101-232: Upper limits from a neutrino search with IceCube
ATel #16348; Jessie Thwaites (University of Wisconsin-Madison), Sam Hori (University of Wisconsin-Madison), Justin Vandenbroucke (University of Wisconsin-Madison), Marcos Santander (University of Alabama)
on 24 Nov 2023; 20:36 UT
Credential Certification: Justin Vandenbroucke (justin.vandenbroucke@wisc.edu)
Subjects: Neutrinos, Blazar
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
IceCube has performed a search for track-like muon neutrino events arriving from the direction of 1ES 1101-232, a TeV-detected, ultra-high-frequency-peaked BL Lac which was found to be flaring in X-rays (ATel #16322). We analyzed a time window of +/- 3 days centered on the Swift flare detection (2023-10-30 12:00:00 UTC to 2023-11-05 12:00:00 UTC), during which IceCube was collecting good quality data. We report a p-value for this search of 1.00, consistent with background expectation.
We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/dE = 3.3 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 in the approximate range between 70 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)
