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.

7 pages, 5 figures, accepted by Physical Review D

References in corpus (11)

• The Third Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• 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
• An improved limit to the diffuse flux of ultra-high energy neutrinos from the Pierre Auger Observatory
• Ultra High Energy Cosmic Rays from Black Hole Jets of Radio Galaxies
• An Analysis of Chandra Deep Follow-up GRBs: Implications for Off-Axis Jets
• On ultra-high energy cosmic ray acceleration at the termination shock of young pulsar winds
• The Galactic Magnetic Field and Ultrahigh-Energy Cosmic Ray Deflections
• Is the Ultra-High Energy Cosmic-Ray Excess Observed by the Telescope Array Correlated with IceCube Neutrinos?
• The Centaurus A Ultrahigh-Energy Cosmic Ray Excess and the Local Extragalactic Magnetic Field
• 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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