High Energy Neutrinos from Recent Blazar Flares

  title={High Energy Neutrinos from Recent Blazar Flares},
  author={Francis Halzen and Ali Kheirandish},
  journal={arXiv: High Energy Astrophysical Phenomena},
The energy density of cosmic neutrinos measured by IceCube matches the one observed by Fermi in extragalactic photons that predominantly originate in blazars. This has inspired attempts to match Fermi sources with IceCube neutrinos. A spatial association combined with a coincidence in time with a flaring source may represent a smoking gun for the origin of the IceCube flux. In June 2015, the Fermi Large Area Telescope observed an intense flare from blazar 3C 279 that exceeded the steady flux of… 

Figures and Tables from this paper

High-energy neutrino flux from individual blazar flares
Motivated by the recently reported evidence of an association between a high-energy neutrino and a γ-ray flare from the blazar TXS 0506+056, we calculate the expected high-energy neutrino signal
On the Detection Potential of Blazar Flares for Current Neutrino Telescopes
Blazar jets are extreme environments, in which relativistic proton interactions with an ultraviolet photon field could give rise to photopion production. High-confidence associations of individual
The galactic contribution to IceCube's astrophysical neutrino flux
High energy neutrinos have been detected by IceCube, but their origin remains a mystery. Determining the sources of this flux is a crucial first step towards multi-messenger studies. In this work we
Can BL Lac emission explain the neutrinos above 0.2 PeV
Multi-messenger astronomy can help to investigate the sources of the high-energy neutrinos observed by the high-energy neutrino telescope IceCube. We consider the hypothesis that the highest energy
Interpretation of the Diffuse Astrophysical Neutrino Flux in Terms of the Blazar Sequence
We study if the diffuse astrophysical neutrino flux can come from blazar jets -- a subclass of Active Galactic Nuclei (AGNs) -- while it, at the same time, respects the blazar stacking limit based on
High-energy emitting BL Lacs and high-energy neutrinos - Prospects for the direct association with IceCube and KM3NeT
Context. The origin of the high-energy flux of neutrinos detected by IceCube remains unknown. Recent works report evidence for a possible positional correlation between the reconstructed neutrino
A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017
High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of cosmic ray acceleration. This paper presents analyses focusing on time-dependent neutrino
A Multimessenger Picture of the Flaring Blazar TXS 0506+056: Implications for High-energy Neutrino Emission and Cosmic-Ray Acceleration
Detection of the IceCube-170922A neutrino coincident with the flaring blazar TXS 0506+056, the first and only ∼3σ high-energy neutrino source association to date, offers a potential breakthrough in
On the direct correlation between gamma-rays and PeV neutrinos from blazars
We study the frequently used assumption in multi-messenger astrophysics that the gamma-ray and neutrino fluxes are directly connected because they are assumed to be produced by the same photohadronic


Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
The presence of a high-energy neutrino flux containing the most energetic neutrinos ever observed is revealed, including 28 events at energies between 30 and 1200 TeV, although the origin of this flux is unknown and the findings are consistent with expectations for a neutRino population with origins outside the solar system.
Evidence for Astrophysical Muon Neutrinos from the Northern Sky with IceCube.
The analysis presented here, a data sample of approximately 35,000 muon neutrinos from the Northern sky is extracted from data taken during 659.5 days of live time recorded between May 2010 and May 2012, and a fit for an astrophysical flux with an arbitrary spectral index is performed.
Observation of high-energy astrophysical neutrinos in three years of IceCube data.
Results from an analysis with a third year of data from the complete IceCube detector are consistent with the previously reported astrophysical flux in the 100 TeV-PeV range at the level of 10(-8)  GeV cm-2 s-1 sr-1 per flavor and reject a purely atmospheric explanation for the combined three-year data at 5.7σ.
Pinpointing Extragalactic Neutrino Sources in Light of Recent IceCube Observations
The IceCube Collaboration has recently reported the observation of a flux of high-energy astrophysical neutrinos. The angular distribution of events is consistent with an isotropic arrival direction
Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration
A search for high-energy neutrinos was performed using data collected by the IceCube Neutrino Observatory from May 2009 to May 2010, when the array was running in its 59-string configuration. The
Testing the hadronuclear origin of PeV neutrinos observed with IceCube
We consider implications of the IceCube signal for hadronuclear (pp) scenarios of neutrino sources such as galaxy clusters/groups and star-forming galaxies. Since the observed neutrino flux is
Extreme blazars as counterparts of IceCube astrophysical neutrinos
We explore the correlation of $\gamma$-ray emitting blazars with IceCube neutrinos by using three very recently completed, and independently built, catalogues and the latest neutrino lists. We
In this paper searches for flaring astrophysical neutrino sources and sources with periodic emission with the IceCube neutrino telescope are presented. In contrast to time-integrated searches, where
Resolving the Extragalactic γ-Ray Background above 50 GeV with the Fermi Large Area Telescope.
This work measures, for the first time, the source count distribution, dN/dS, of extragalactic γ-ray sources at E>50  GeV and finds that it is compatible with a Euclidean distribution down to the lowest measured source flux in the 2FHL.