Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

Abstract

Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen-Zatsepin-Kuz'min energy threshold, \nobreak{$6\times 10^{19}$eV}. The anisotropy was measured by the fraction of arrival directions that are less than $3.1^{\circ }$ from the position of an active galactic nucleus within 75 Mpc (using the Véron-Cetty and Véron $12^{\mathrm{th}}$ catalog). An updated measurement of this fraction is reported here using the arrival directions of cosmic rays recorded above the same energy threshold through 31 December 2009. The number of arrival directions has increased from 27 to 69, allowing a more precise measurement. The correlating fraction is $(38_{-6}^{+7})$, compared with $21$ expected for isotropic cosmic rays. This is down from the early estimate of $(69_{-13}^{+11})$. The enlarged set of arrival directions is examined also in relation to other populations of nearby extragalactic objects: galaxies in the 2 Microns All Sky Survey and active galactic nuclei detected in hard X-rays by the Swift Burst Alert Telescope. A celestial region around the position of the radiogalaxy Cen A has the largest excess of arrival directions relative to isotropic expectations. The 2-point autocorrelation function is shown for the enlarged set of arrival directions and compared to the isotropic expectation.

Accepted for publication in Astroparticle Physics on 31 August 2010

References in corpus (1)

• Search for Correlations between HiRes Stereo Events and Active Galactic Nuclei

Cited by in corpus (174)

• Cosmological Magnetic Fields: Their Generation, Evolution and Observation
• The Astrophysics of Ultrahigh Energy Cosmic Rays
• Measurements of the Cosmic Ray Composition with Air Shower Experiments
• Observation of a Large-scale Anisotropy in the Arrival Directions of Cosmic Rays above $8\times 10^{18}$ eV
• 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
• The microphysics of collisionless shock waves
• Muons in air showers at the Pierre Auger Observatory: Mean number in highly inclined events
• Indication of anisotropy in arrival directions of ultra-high-energy cosmic rays through comparison to the flux pattern of extragalactic gamma-ray sources
• Ultra-High-Energy Cosmic Rays
• Extragalactic propagation of ultrahigh energy cosmic-rays
• Newly-born pulsars as sources of ultrahigh energy cosmic rays
• Particle acceleration in relativistic outflows
• Evidence for an axion-like particle from PKS 1222+216?
• Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
• Measurement of zero degree single photon energy spectra for sqrt(s) = 7TeV proton-proton collisions at LHC
• "Espresso" Acceleration of Ultra-high-energy Cosmic Rays
• The need for a local source of UHE CR nuclei
• Ultra-high energy cosmic rays from shocks in the lobes of powerful radio galaxies
• Mass entrainment and turbulence-driven acceleration of ultra-high energy cosmic rays in Centaurus A
• Counting Black Holes: The Cosmic Stellar Remnant Population and Implications for LIGO
• Search for Anisotropy of Ultra-High Energy Cosmic Rays with the Telescope Array Experiment
• POEMMA's Target of Opportunity Sensitivity to Cosmic Neutrino Transient Sources
• Gamma-Ray Constraints on Maximum Cosmogenic Neutrino Fluxes and UHECR Source Evolution Models
• Bounds on the density of sources of ultra-high energy cosmic rays from the Pierre Auger Observatory
• Fornax A, Centaurus A and other radio galaxies as sources of ultra-high energy cosmic rays
• A Case for Radio Galaxies as the Sources of IceCube's Astrophysical Neutrino Flux
• Propagation of Ultra High Energy Cosmic Rays in Extragalactic Magnetic Fields: A view from cosmological simulations
• The Heraklion Extragalactic Catalogue (HECATE): a value-added galaxy catalogue for multi-messenger astrophysics
• Cosmic Ray Extremely Distributed Observatory
• Centaurus A: the one extragalactic source of cosmic rays with energies above the knee
• Ultrahigh Energy Nuclei in the Turbulent Galactic Magnetic Field
• Measurement of forward neutral pion transverse momentum spectra for $\sqrt{s}$ = 7TeV proton-proton collisions at LHC
• Cosmic rays in galactic and extragalactic magnetic fields
• High-Energy Emission Induced by Ultra-High-Energy Photons as a Probe of Ultra-High-Energy Cosmic-Ray Accelerators Embedded in the Cosmic Web
• Spacetime noncommutativity and ultra-high energy cosmic ray experiments
• Lorentz Invariance Violation and Chemical Composition of Ultra High Energy Cosmic Rays
• PT-symmetric noncommutative spaces with minimal volume uncertainty relations
• A Monte Carlo Bayesian Search for the Plausible Source of the Telescope Array Hotspot
• The spectra of jet bases in FR I radio galaxies: implications for particle acceleration
• Detection of ultra-high energy cosmic ray showers with a single-pixel fluorescence telescope
• Non-thermal Processes in Black-Hole-Jet Magnetospheres
• Cosmic Rays from the Ankle to the Cut-Off
• Measurement of zero degree inclusive photon energy spectra for $\sqrt{s}=$ 900 GeV proton-proton collisions at LHC
• Ultra-high-energy-cosmic-ray hot spots from tidal disruption events
• Galactic magnetic deflections and Centaurus A as a UHECR source
• GW150914-like Black Holes as Galactic High-Energy Sources
• Importance of axion-like particles for very-high-energy astrophysics
• A Uniformly Selected, All-Sky, Optical AGN Catalog
• Correlating high-energy IceCube neutrinos with 5BZCAT blazars and RFC sources
• Nationalism and internationalism in science: the case of the discovery of cosmic rays
• Nearby low-luminosity GRBs as the sources of ultra-high energy cosmic rays revisited
• Constraining models for the origin of ultra-high-energy cosmic rays with a novel combined analysis of arrival directions, spectrum, and composition data measured at the Pierre Auger Observatory
• Magnetic Deflections of Ultra-High Energy Cosmic Rays from Centaurus A
• Performance and science reach of POEMMA for ultrahigh-energy particles
• What can be learnt from UHECR anisotropies observations? Paper I : large-scale anisotropies and composition features
• Tidal Disruption Flares as the Source of Ultra-high Energy Cosmic Rays
• Anisotropy expectations for ultra-high-energy cosmic rays with future high statistics experiments
• Cosmic Ray Origin: Lessons from Ultra-High-Energy Cosmic Rays and the Galactic/Extragalactic Transition
• An upper limit on the cosmic-ray luminosity of individual sources from gamma-ray observations
• The Centaurus A Ultrahigh-Energy Cosmic Ray Excess and the Local Extragalactic Magnetic Field
• High energy processes in the vicinity of the Kerr's black hole horizon
• Ultra-high Energy Cosmic Rays and Neutrinos from Gamma-Ray Bursts, Hypernovae and Galactic Shocks
• Propagation of Ultra-High-Energy Cosmic Ray Nuclei in Cosmic Magnetic Fields and Implications for Anisotropy Measurements
• SUSY Renormalization Group Effects in Ultra High Energy Neutrinos
• On ultra-high energy cosmic rays: origin in AGN jets and transport in expanding Universe
• Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
• Statistical Analysis of the Correlation between Active Galactic Nuclei and Ultra-High Energy Cosmic Rays
• A lunar radio experiment with the Parkes radio telescope for the LUNASKA project
• Filaments of Galaxies as a Clue to the Origin of Ultra-High-Energy Cosmic Rays
• Isotropy constraints on powerful sources of ultrahigh-energy cosmic rays at $10^{19}$ eV
• Cosmic rays and tests of fundamental principles
• Update on tests of the Cen A neutron-emission model of highest energy cosmic rays
• Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory
• Phenomenology of Space-time Imperfection I: Nonlocal Defects
• The Production of Ultra High Energy Cosmic Rays during the Early Epochs of Radio-loud AGN
• A Search for Correlation of Ultra-High Energy Cosmic Rays with IRAS-PSCz and 2MASS-6dF Galaxies
• Can Ultrahigh Energy Cosmic Rays Come from Gamma-Ray Bursts? II: Cosmic Rays Below the Ankle and Galactic GRB
• On collisions with unlimited energies in the vicinity of Kerr and Schwarzschild black hole horizons
• Acceleration and propagation of ultrahigh energy cosmic rays
• Search for a correlation between ANTARES neutrinos and Pierre Auger Observatory UHECRs arrival directions
• Impact of using the ultra-high-energy cosmic ray arrival energies to constrain source associations
• Study of the PeV Neutrino, $\gamma$-rays and UHECRs around The Lobes of Centaurus A
• On the synthesis of heavy nuclei in protomagnetar outflows and implications for ultra-high energy cosmic rays
• On the excess of ultra-high energy cosmic rays in the direction of Centaurus A
• A limit on the ultra-high-energy neutrino flux from lunar observations with the Parkes radio telescope
• Measurements and implications of cosmic ray anisotropies from TeV to trans-EeV energies
• A Uniformly Selected, Southern-Sky 6dF, Optical AGN Catalog
• Measurement of the Muon Production Depths at the Pierre Auger Observatory
• ARIANNA: A radio detector array for cosmic neutrinos on the Ross Ice Shelf
• Constraining Sources of Ultra High Energy Cosmic Rays Using High Energy Observations with the Fermi Satellite
• Method to Look for Imprints of Ultrahigh Energy Nuclei Sources
• Detecting ultra-high energy cosmic ray anisotropies through cross-correlations
• Anisotropies of Ultra-high Energy Cosmic Rays Dominated by a Single Source in the Presence of Deflections
• Ultra-High-Energy Cosmic Rays from Low-Luminosity Active Galactic Nuclei
• Simulations for a next-generation UHECR observatory
• Testing the isotropy of high energy cosmic rays using spherical needlets
• High-Energy Gamma Rays and Neutrinos from Nearby Radio Galaxies
• The Highest-Energy Cosmic Rays Cannot be Dominantly Protons from Steady Sources
• Limit on intergalactic magnetic field from ultra-high-energy cosmic ray hotspot in Perseus-Pisces region
• Centaurus A as a point source of Ultra-High Energy Cosmic Rays
• What can be learnt from UHECR anisotropies observations Paper II: intermediate-scale anisotropies
• Ultra-High Energy Cosmic Rays: Results and Prospects
• Neutrinos and cosmic rays
• A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory
• Systematic exploration of heavy element nucleosynthesis in protomagnetar outflows
• A comparison study of CORSIKA and COSMOS simulations for extensive air showers
• Searches for correlation between UHECR events and high-energy gamma-ray Fermi-LAT data
• Influence of cosmological models on the GZK horizon of ultrahigh energy protons
• The current status of orbital experiments for UHECR studies
• Magnetic Fields in the Milky Way and in Galaxies (revised version of September 2023)
• Measurements of cosmic rays at the highest energies with the Pierre Auger Observatory
• Chandra observations and classification of AGN-candidates correlated with Auger UHECRs
• Multilevel Bayesian framework for modeling the production, propagation and detection of ultra-high energy cosmic rays
• Large-scale distribution of cosmic rays in right ascension as observed by the Yakutsk array at energies above $10^{18}$ eV
• IceCube expectations for two high-energy neutrino production models at active galactic nuclei
• Optical circular polarization induced by axionlike particles in blazars
• AugerPrime -- The upgrade of the Pierre Auger Observatory
• The observation of Extensive Air Showers from an Earth-Orbiting Satellite
• Search for ultra-high energy photons through preshower effect with gamma-ray telescopes: Study of CTA-North efficiency
• Status and Strategies of Current LUNASKA Lunar Cherenkov Observations with the Parkes Radio Telescope
• Testing Hadronic Models of Gamma Ray Production at the Core of Cen A
• Cosmic rays: current status, historical context
• Cosmic Rays at the highest energies
• TeV sky versus AUGER one: are UHECR also radioactive, heavy galactic nuclei?
• Summary of Lepton Photon 2011
• Lorentz violation, vacuum, cosmic rays, superbradyons and Pamir data
• Interpreting correlated observations of cosmic rays and gamma-rays from Centaurus A with a proton blazar inspired model
• The flux suppression at the highest energies
• Ultrahigh Energy Cosmic Rays and Neutrinos
• Theoretical Challenges in Acceleration and Transport of Ultra High Energy Cosmic Rays: A Review
• A Bayesian analysis of the 69 highest energy cosmic rays detected by the Pierre Auger Observatory
• The distribution of ultra-high-energy cosmic rays along the supergalactic plane measured at the Pierre Auger Observatory
• Revisit of Correlation Analysis between Active Galactic Nuclei and Ultra-High Energy Cosmic Rays
• Impact of Galactic magnetic field modelling on searches of point sources via UHECR-Neutrino correlations
• Detection prospects of the Telescope Array hotspot by space observatories
• Constraints on Physical Conditions for the Acceleration on Ultra-high-energy Cosmic Rays in Nearby Active Galactic Nuclei Observed with the Fermi Large Area Telescope
• Search for ultra high energy cosmic ray sources. FRI radio galaxy Centaurus A
• A 20 GeVs transparent neutrino astronomy from the North Pole?
• Signatures of New Physics from HBT Correlations in UHECRs
• Directional correlations between UHECRs and neutrinos observed with IceCube
• Extended clustering analyses to constrain the deflection angular scale and source density of the ultra-high-energy cosmic rays
• A Bayesian Approach to Comparing Cosmic Ray Energy Spectra
• TeV gamma-UHECR anisotropy by decaying nuclei in flight: first neutrino traces?
• Measurement of Ultra-High Energy Cosmic Rays: An Experimental Summary and Prospects
• Spectra and Mass Composition of Ultrahigh-Energy Cosmic Rays from Point Sources
• Anisotropy studies with the Pierre Auger Observatory
• Photo-Disintegration of Heavy Nuclei at the Core of Cen A
• Ultra-High Energy Cosmic Rays: Recent Results and Future Plans of Auger
• A Bayesian self-clustering analysis of the highest energy cosmic rays detected by the Pierre Auger Observatory
• Effects of galactic magnetic field on the UHECR correlation studies with starburst galaxies
• HERMES: Simulating the Propagation of Ultra-High Energy Cosmic Rays
• Data Processing at the Pierre Auger Observatory
• Correlation between Ultra-high Energy Cosmic Rays and Active Galactic Nuclei from Fermi Large Area Telescope
• Astrophysical and cosmological problems of invisible mass and dark energy in the Universe
• Future ground arrays for ultrahigh-energy cosmic rays: recent updates and perspectives
• Sources of UHECRs in view of the TUS and JEM-EUSO experiments
• Cen A persistence and Virgo absence versus updated maps to understand UHECR nature
• Ultra-high energy cosmic ray correlations with Active Galactic Nuclei in the world dataset
• Detection of Earth-skimming UHE tau neutrino with the JEM-EUSO detector
• Radiodetection of Neutrinos
• A lower bound on the number of cosmic ray events required to measure source catalogue correlations
• Recent advances on multimessenger astrophysics: Centaurus A, GW 170817, and KM3-230213A
• Ultra-high energy cosmic rays and the extragalactic gamma ray flux
• Search for Nuclei Sources in the Ultra-High Energy Cosmic Ray Data
• Ultra high-energy cosmic rays from beyond the Greisen-Zatsepin-Kuz'min horizon
• Status of Neutrino Astronomy - a mini-review on neutrino telescopes
• Ultrahigh energy cosmic ray nuclei from remnants of dead quasars
• Origin of the Ultrahigh-Energy Cosmic Rays and their Spectral Break
• UHECR Acceleration in Dark Matter Filaments of Cosmological Structure Formation
• A Study on Anisotropy in the Arrival Directions of Ultra-High-Energy Cosmic Rays Observed by Pierre Auger Observatory
• Cosmological Implications of Trace-Charged Dark Matter
• Ensemble fluctuations of the cosmic ray energy spectrum and the intergalactic magnetic field
• A Bayesian on-off analysis of cosmic ray data
• Astrophysical neutrino results