A Monte Carlo Bayesian Search for the Plausible Source of the Telescope Array Hotspot

Abstract

The Telescope Array (TA) collaboration has reported a hotspot of 19 ultrahigh-energy cosmic rays (UHECRs). Using a universal model with one source and energy-dependent magnetic deflections, we show that the distribution of the TA hotspot events is consistent with a single source hypothesis, although multiple sources cannot be ruled out. The chance probability of this distribution arising from a homogeneous distribution is $0.2\%$. We describe a Monte Carlo Bayesian (MCB) inference approach, which can be used to derive parameters of the magnetic fields as well as the source coordinates, and we apply this method to the TA hotspot data, inferring the location of the likely source. We discuss possible applications of the same approach to future data.

arXiv comment7 pages, 5 figures, accepted by Physical Review D

References in corpus (46)

• The Global Schmidt Law in Star Forming Galaxies
• Fermi Large Area Telescope Second Source Catalog
• Design Concepts for the Cherenkov Telescope Array
• COSMOLOGICAL GAMMA RAY BURSTS AND THE HIGHEST ENERGY COSMIC RAYS
• Origin and Propagation of Extremely High Energy Cosmic Rays
• On the acceleration of Ultra High Energy Cosmic Rays in Gamma Ray Bursts
• The Third Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• The Astrophysics of Ultrahigh Energy Cosmic Rays
• The deepest Herschel-PACS far-infrared survey: number counts and infrared luminosity functions from combined PEP/GOODS-H observations
• GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT
• Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
• Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
• Evolution of the dusty infrared luminosity function from z=0 to z=2.3 using observations from Spitzer
• Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
• Gamma-Ray Bursts in the Swift Era
• Magnetars in the Metagalaxy: An Origin for Ultra High Energy Cosmic Rays in the Nearby Universe
• Blazars as Ultra-High-Energy Cosmic-Ray Sources: Implications for TeV Gamma-Ray Observations
• Sensitivity of the High Altitude Water Cherenkov Detector to Sources of Multi-TeV Gamma Rays
• High-energy cosmic-ray nuclei from high- and low-luminosity gamma-ray bursts and implications for multi-messenger astronomy
• An improved limit to the diffuse flux of ultra-high energy neutrinos from the Pierre Auger Observatory
• Search for cosmic-ray induced gamma-ray emission in Galaxy Clusters
• Ultra High Energy Cosmic Rays from Black Hole Jets of Radio Galaxies
• Newly-born pulsars as sources of ultrahigh energy cosmic rays
• Cluster Accretion Shocks as Possible Acceleration Sites for Ultra High Energy Protons below the Greisen Cutoff
• The Impact of Heavy Nuclei on the Cosmogenic Neutrino Flux
• Discovery of Very High Energy $\gamma$-Rays from Markarian~180 Triggered by an Optical Outburst
• Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
• Constraints on the Ultra High Energy Photon flux using inclined showers from the Haverah Park array
• An Analysis of Chandra Deep Follow-up GRBs: Implications for Off-Axis Jets
• Diffuse PeV neutrino emission from Ultra-Luminous Infrared Galaxies
• Role of Galactic sources and magnetic fields in forming the observed energy-dependent composition of ultrahigh-energy cosmic rays
• Implications of Ultra-High-Energy Cosmic Rays for Transient Sources in the Auger Era
• Constraints on the Star Formation Rate from Supernova Relic Neutrino Observations
• Delayed GeV--TeV Photons from Gamma-Ray Bursts Producing High-Energy Cosmic Rays
• On ultra-high energy cosmic ray acceleration at the termination shock of young pulsar winds
• High energy emission of GRB 130427A: evidence for inverse Compton radiation
• Deflections of cosmic rays in a random component of the Galactic magnetic field
• The Galactic Magnetic Field and Ultrahigh-Energy Cosmic Ray Deflections
• Galactic magnetic deflections and Centaurus A as a UHECR source
• Is the Ultra-High Energy Cosmic-Ray Excess Observed by the Telescope Array Correlated with IceCube Neutrinos?
• UHECR observations and lensing in the magnetic field of the Virgo cluster
• The Centaurus A Ultrahigh-Energy Cosmic Ray Excess and the Local Extragalactic Magnetic Field
• Propagation of Ultra-High-Energy Cosmic Ray Nuclei in Cosmic Magnetic Fields and Implications for Anisotropy Measurements
• Extragalactic Sources for Ultra High Energy Cosmic Ray Nuclei
• Supernova and GRB connection: Observations and Questions
• Upper limits on the VHE $\gamma$-ray flux from the ULIRG Arp 220 and other galaxies with VERITAS

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• The Heraklion Extragalactic Catalogue (HECATE): a value-added galaxy catalogue for multi-messenger astrophysics
• Deflections of UHECRs in the Galactic magnetic field
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• Evidence of Intermediate-Scale Energy Spectrum Anisotropy of Cosmic Rays E$\ge$10${}^{19.2}$ eV with the Telescope Array Surface Detector
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• Exploring the superwind mechanism for generating ultrahigh-energy cosmic rays using large-scale modeling of starbursts
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• Exploring the Emission Mechanisms of Mrk 180 with long term X-ray and $\gamma$-ray data
• Can we reconcile the TA excess and hotspot with Auger observations?
• Search for ultra high energy cosmic rays from radiogalaxy Virgo A
• Treasure Maps for Detections of Extreme Energy Cosmic Rays
• Evidence for UHECR origin in starburst galaxies
• Astrophysical Evidence of Wakefield Acceleration in Galactic and Extragalactic Jets via Gamma Rays and UHECRs
• Effects of galactic magnetic field on the UHECR correlation studies with starburst galaxies
• Observe Gamma-Rays and Neutrinos Associated with Ultra-High Energy Cosmic Rays
• Ultra high-energy cosmic rays from beyond the Greisen-Zatsepin-Kuz'min horizon
• Beyond the Local Void: A data-driven search for the origins of the Amaterasu particle
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