Search for Blazar Flux-Correlated TeV Neutrinos in IceCube 40-String Data

Abstract

We present a targeted search for blazar flux-correlated high-energy (${\epsilon }_{\nu }>1$ TeV) neutrinos from six bright northern blazars, using the public database of northern-hemisphere neutrinos detected during "IC40" 40-string operations of the IceCube neutrino observatory (April 2008 to May 2009). Our six targeted blazars are subjects of long-term monitoring campaigns by the VERITAS TeV gamma-ray observatory. We use the publicly-available VERITAS lightcurves to identify periods of excess and flaring emission. These predefined intervals serve as our "active temporal windows" in a search for an excess of neutrinos, relative to Poisson fluctuations of the near-isotropic atmospheric neutrino background which dominates at these energies. After defining the parameters of an optimized search, we confirm the expected Poisson behavior with Monte Carlo simulations prior to testing for excess neutrinos in the actual data. We make two searches: One for excess neutrinos associated with the bright flares of Mrk 421 that occurred during the IC40 run, and one for excess neutrinos associated with the brightest emission periods of five other blazars (Mrk 501, 1ES 0805+524, 1ES 1218+304, 3C66A, and W Comae), all significantly fainter than the Mrk 421 flares. We find no significant excess of neutrinos from the preselected blazar directions during the selected temporal windows. We derive 90%-confidence upper limits on the number of expected flux-associated neutrinos from each search. These limits are consistent with previous point-source searches and Fermi GeV flux-correlated searches. Our upper limits are sufficiently close to the physically-interesting regime that we anticipate future analyses using already-collected data will either constrain models or yield discovery of the first blazar-associated high-energy neutrinos.

arXiv comment11 Pages, 4 tables, 3 figures. Bulk of table 2 provided in machine readable format

References in corpus (58)

• The NumPy array: a structure for efficient numerical computation
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• High Energy Neutrinos from Cosmological Gamma-Ray Burst Fireballs
• First observation of PeV-energy neutrinos with IceCube
• The Swift/BAT Hard X-ray Transient Monitor
• Modeling the Extragalactic Background Light from Stars and Dust
• Particle Physics with High Energy Neutrinos
• TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
• First Year Performance of The IceCube Neutrino Telescope
• Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650
• Testing the Hadronuclear Origin of PeV Neutrinos Observed with IceCube
• VERITAS: the Very Energetic Radiation Imaging Telescope Array System
• Modeling the Emission Processes in Blazars
• An Absence of Neutrinos Associated with Cosmic Ray Acceleration in Gamma-Ray Bursts
• Diffuse Neutrino Intensity from the Inner Jets of Active Galactic Nuclei: Impacts of External Photon Fields and the Blazar Sequence
• The First VERITAS Telescope
• TeV Neutrinos from Successful and Choked Gamma-Ray Bursts
• TeV-PeV Neutrinos from Low-Power Gamma-Ray Burst Jets inside Stars
• The Cumulative Bakground of High-Energy Neutrinos from Starburst Galaxies
• A hadronic origin for ultra-high-frequency-peaked BL Lac objects
• High Energy Astrophysical Neutrinos: the Upper Bound is Robust
• The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays
• Blazars as Ultra-High-Energy Cosmic-Ray Sources: Implications for TeV Gamma-Ray Observations
• High-Energy Neutrinos from Photomeson Processes in Blazars
• Probing the Galactic Origin of the IceCube Excess with Gamma-Rays
• Star-forming galaxies as the origin of diffuse high-energy backgrounds: Gamma-ray and neutrino connections, and implications for starburst history
• Searches for Extended and Point-like Neutrino Sources with Four Years of IceCube Data
• Time-Integrated Searches for Point-like Sources of Neutrinos with the 40-String IceCube Detector
• Extragalactic Background Light from Hierarchical Galaxy Formation: Gamma-ray Attenuation up to the Epoch of Cosmic Reionization and the First Stars
• Neutrino Fluxes from Active Galaxies: a Model-Independent Analysis
• Cosmic Neutrino Pevatrons: A Brand New Pathway to Astronomy, Astrophysics, and Particle Physics
• Secondary photons and neutrinos from cosmic rays produced by distant blazars
• On the origin of the gamma-ray emission from the flaring blazar PKS 1222+216
• Cosmic Rays Above the Second Knee from Clusters of Galaxies and Associated High-Energy Neutrino Emission
• A Search for a Diffuse Flux of Astrophysical Muon Neutrinos with the IceCube 40-String Detector
• Variable Gamma-ray Emission Induced by Ultra-High Energy Neutral Beams: Application to 4C +21.35
• Demystifying the PeV Cascades in IceCube: Less (Energy) is More (Events)
• Neutrino and cosmic-ray emission from multiple internal shocks in gamma-ray bursts
• Sub-PeV Neutrinos from TeV Unidentified Sources in the Galaxy
• Search for muon neutrinos from gamma-ray bursts with the ANTARES neutrino telescope using 2008 to 2011 data
• Searches for Time Dependent Neutrino Sources with IceCube Data from 2008 to 2012
• Neutrino Events at IceCube and the Fermi Bubbles
• High Energy Neutrinos from the TeV Blazar 1ES 1959+650
• Observation of Markarian 421 in TeV gamma rays over a 14-year time span
• A hadronic synchrotron mirror model for the "orphan" TeV flare in 1ES 1959+650
• Gamma Rays and Neutrinos from a Powerful Cosmic Accelerator
• Extragalactic star-forming galaxies with hypernovae and supernovae as high-energy neutrino and gamma-ray sources: the case of the 10 TeV neutrino data
• Spectrum and Morphology of the Two Brightest Milagro Sources in the Cygnus Region: MGRO J2019+37 and MGRO J2031+41
• Time-dependent neutrino emission from Mrk 421 during flares and predictions for IceCube
• Neutrino emission in the hadronic Synchrotron Mirror Model: the "orphan" TeV flare from 1ES 1959+650
• Long-term lightcurves from combined unified very high energy $\gamma$-ray data
• On the neutrino non-detection of GRB 130427A
• Hadronic-Origin orphan TeV flare from the 1ES 1959+650
• Estimating the contribution of Galactic sources to the diffuse neutrino flux
• Steady-State Hadronic Gamma-Ray Emission from 100-Myr-Old Fermi Bubbles
• Ultra-high Energy Cosmic Rays and Neutrinos from Gamma-Ray Bursts, Hypernovae and Galactic Shocks
• On the classification of flaring states of blazar

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• Blazar Flares as an Origin of High-Energy Cosmic Neutrinos?
• On the direct correlation between gamma-rays and PeV neutrinos from blazars
• High energy neutrino flux from individual blazar flares
• A comprehensive power spectral density analysis of astronomical time series I: the Fermi-LAT gamma-ray light curves of selected blazars
• The Astrophysical Multimessenger Observatory Network (AMON): Performance and Science Program
• Fermi-LAT counterparts of IceCube neutrinos above 100 TeV
• A Coincidence Search for Cosmic Neutrino and Gamma-Ray Emitting Sources Using IceCube and Fermi LAT Public Data
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