FSRQ B2 1348+30B: Upper limits from a neutrino search with IceCube
ATel #15492; Jessie Thwaites, Justin Vandenbroucke, Marcos Santander for the IceCube Collaboration
on 1 Jul 2022; 21:42 UT
Credential Certification: Justin Vandenbroucke (justin.vandenbroucke@wisc.edu)
Subjects: Neutrinos, AGN, Quasar
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 FSRQ OP 313 (B2 1308+32), which has been recently reported by several observatories to be at the brightest ever optical flux levels for this source (see ATel #15480, #15476, #15474, #15459, #15447) and also in a flaring state in gamma rays (ATel #15483).
The search was performed using a time window of 30 days (2022-06-01 12:00:00.0 UTC to 2022-07-01 12:00:00.0 UTC), during which IceCube was collecting good quality data.
We find that the data are consistent with atmospheric background expectations, with a p-value of 1. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 6.1 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 600 GeV and 400 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.
