High-energy neutrinos from X-rays flares of blazars frequently observed by the Swift X-Ray Telescope

Abstract

Blazar flares have been suggested as ideal candidates for enhanced neutrino production. While the neutrino signal of $\gamma$-ray flares has been widely discussed, the neutrino yield of X-ray flares has received less attention. Here, we compute the predicted neutrino signal from X-ray flares detected in 66 blazars observed more than 50 times with the X-ray Telescope (XRT) on board the Neil Gehrels Swift Observatory. We consider a scenario where X-ray flares are powered by synchrotron radiation of relativistic protons, and neutrinos are produced through photomeson interactions between protons with their own synchrotron X-ray photons. Using the 1 keV X-ray light curves for flare identification, the 0.5-10 keV fluence of each flare as a proxy for the all-flavour neutrino fluence, and the IceCube point-source effective area for different detector configurations, we calculate the number of muon and antimuon neutrinos above 100 TeV expected for IceCube from each flaring source. The bulk of the neutrino events from the sample originates from flares with durations $\sim 1-10$ d. Accounting for the X-ray flare duty cycle of the sources in the sample, which ranges between $\sim 2$ and 24 per cent, we compute an average yearly neutrino rate for each source. The median of the distribution (in logarithm) is $\sim 0.03$ yr${}^{-1}$, with Mkn 421 having the highest predicted rate $1.2\pm 0.3$ yr${}^{-1}$, followed by 3C 273 $(0.33\pm 0.03$ yr${}^{-1})$ and PG 1553+113 ($0.25\pm 0.02$ yr${}^{-1}$). Next-generation neutrino detectors together with regular X-ray monitoring of blazars could constrain the duty cycle of hadronic X-ray flares.

arXiv comment17 pages, 16 figures, Accepted for publication in MNRAS

References in corpus (78)

• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Swift X-ray Telescope
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• A Unifying View of the Spectral Energy Distributions of Blazars
• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
• The Spectral Energy Distribution of Fermi bright blazars
• Letter of Intent for KM3NeT 2.0
• First observation of PeV-energy neutrinos with IceCube
• First Results from the All-Sky Monitor on the Rossi X-ray Timing Explorer
• Studies in Astronomical Time Series Analysis. VI. Bayesian Block Representations
• The Connection between X-ray- and Radio-Selected BL Lacertae Objects
• BL Lac Objects in the Synchrotron Proton Blazar Model
• TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
• Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data
• Time-integrated Neutrino Source Searches with 10 years of IceCube Data
• A Proton Synchrotron Blazar Model for Flaring in Markarian~501
• Gamma-ray Light Curves and Variability of Bright Fermi-Detected Blazars
• Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos
• The 5th edition of the Roma-BZCAT. A short presentation
• Diffuse Neutrino Intensity from the Inner Jets of Active Galactic Nuclei: Impacts of External Photon Fields and the Blazar Sequence
• A Multimessenger Picture of the Flaring Blazar TXS 0506+056: implications for High-Energy Neutrino Emission and Cosmic Ray Acceleration
• Coincidence of a high-fluence blazar outburst with a PeV-energy neutrino event
• Constraining High-Energy Cosmic Neutrino Sources: Implications and Prospects
• Simultaneous Planck, Swift, and Fermi observations of X-ray and gamma-ray selected blazars
• The Pacific Ocean Neutrino Experiment
• Photohadronic origin of $\gamma$-ray BL Lac emission: implications for IceCube neutrinos
• Extending the search for muon neutrinos coincident with gamma-ray bursts in IceCube data
• Blazar Flares as an Origin of High-Energy Cosmic Neutrinos?
• The redshift of the BL Lac object TXS 0506+056
• Extreme blazars as counterparts of IceCube astrophysical neutrinos
• Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data
• The hadronic interaction model Sibyll-2.3c and inclusive lepton fluxes
• Constraining the limiting brightness temperature and Doppler factors for the largest sample of radio bright blazars
• Are both BL Lacs and pulsar wind nebulae the astrophysical counterparts of IceCube neutrino events?
• Leptohadronic blazar models applied to the 2014-15 flare of TXS 0506+056
• Characterizing the Gamma-Ray Variability of the Brightest Flat Spectrum Radio Quasars Observed with the Fermi LAT
• Cascading Constraints from Neutrino Emitting Blazars: The case of TXS 0506+056
• Dissecting the regions around IceCube high-energy neutrinos: growing evidence for the blazar connection
• The 3HSP catalogue of Extreme & High Synchrotron Peaked Blazars
• The Central Engines of Fermi Blazars
• Investigation of two Fermi-LAT gamma-ray blazars coincident with high-energy neutrinos detected by IceCube
• Search for steady point-like sources in the astrophysical muon neutrino flux with 8 years of IceCube data
• Multi-Epoch Modeling of TXS 0506+056 and Implications for Long-Term High-Energy Neutrino Emission
• The brightest gamma-ray flares of blazars
• Search for Sources of Astrophysical Neutrinos Using Seven Years of IceCube Cascade Events
• Astrophysical Sources of High Energy Neutrinos in the IceCube Era
• Structured jets in BL Lac objects: efficient PeV neutrino factories?
• A two-zone model for blazar emission: implications for TXS 0506+056 and the neutrino event IceCube-170922A
• High energy neutrino flux from individual blazar flares
• Patterns in the multi-wavelength behavior of candidate neutrino blazars
• A Neutral Beam Model for High-Energy Neutrino Emission from the Blazar TXS 0506+056
• IceCube Data for Neutrino Point-Source Searches Years 2008-2018
• Time-dependent neutrino emission from Mrk 421 during flares and predictions for IceCube
• The BH mass of nearby QSOs: a comparison of the bulge luminosity and virial methods
• Long-term multi-wavelength variability and correlation study of Markarian 421 from 2007 to 2009
• Multiwavelength observations of the blazar BL Lacertae: a new fast TeV gamma-ray flare
• Complementarity of Stacking and Multiplet Constraints on the Blazar Contribution to the Cumulative High-Energy Neutrino Intensity
• The BL-Lac gamma-ray blazar PKS 1424+240 associated with a group of galaxies at z=0.6010
• Proton Synchrotron $\gamma$-rays and the Energy Crisis in Blazars
• Revisiting AGN as the Source of IceCube's Diffuse Neutrino Flux
• The Open Universe VOU-Blazars tool
• Can we observe neutrino flares in coincidence with explosive transients?
• Open Universe for Blazars: a new generation of astronomical products based on 14 years of Swift-XRT data
• Testing emission models on the extreme blazar 2WHSP J073326.7+515354 detected at very high energies with the MAGIC telescopes
• Accretion Discs in Blazars
• Redshift determination of the BL Lac object 3C66A by the detection of its host galaxy cluster at $z=0.340$
• X-ray Intraday Variability of the TeV Blazar Mrk 421 with {\it Chandra}
• On the classification of flaring states of blazar
• The strange case of the transient HBL blazar 4FGL J1544.3-0649
• Hadronic X-ray Flares from Blazars
• $\gamma$-ray observations of extraterrestrial neutrino track event positions
• Can BL Lac emission explain the neutrinos above 0.2 PeV?
• X-ray spectral variations of synchrotron peak in BL Lacs
• The Open Universe Initiative
• Baikal-GVD: status and prospects

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• Optical/$\gamma$-ray blazar flare correlations: understanding the high-energy emission process using ASAS-SN and Fermi light curves
• Association of the IceCube neutrinos with blazars in the CGRaBS sample
• Flare Duty Cycle of Gamma-Ray Blazars and Implications for High-Energy Neutrino Emission
• Hard X-ray emission from blazars associated with high-energy neutrinos
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• The physical properties of candidate neutrino-emitter blazars
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