399 citations · 2.4k across the 36 of their papers we have counts for
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Isotropy of cosmic rays beyond eV favors their heavy mass composition
Telescope Array Collaboration, R. U. Abbasi, Y. Abe +138
We report an estimation of the injected mass composition of ultra-high energy cosmic rays (UHECRs) at energies higher than 10 EeV. The composition is inferred from an energy-depend…
Mass composition of ultra-high energy cosmic rays from distribution of their arrival directions with the Telescope Array
Telescope Array Collaboration, R. U. Abbasi, Y. Abe +138
We use a new method to estimate the injected mass composition of ultrahigh cosmic rays (UHECRs) at energies higher than 10 EeV. The method is based on comparison of the energy-depe…
Observation of Declination Dependence in the Cosmic Ray Energy Spectrum
The Telescope Array Collaboration, R. U. Abbasi, T. Abu-Zayyad +122
We report on an observation of the difference between northern and southern skies of the ultrahigh energy cosmic ray energy spectrum with a significance of . We use measu…
An extremely energetic cosmic ray observed by a surface detector array
Telescope Array Collaboration
Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest energy events thought to come from extragalactic sources. Their arrival is infrequent, s…
Observation of Variations in Cosmic Ray Single Count Rates During Thunderstorms and Implications for Large-Scale Electric Field Changes
R. U. Abbasi, T. Abu-Zayyad, M. Allen +160
We present the first observation by the Telescope Array Surface Detector (TASD) of the effect of thunderstorms on the development of cosmic ray single count rate intensity over a 7…
Indications of a Cosmic Ray Source in the Perseus-Pisces Supercluster
Telescope Array Collaboration, R. U. Abbasi, T. Abu-Zayyad +155
The Telescope Array Collaboration has observed an excess of events with in the data which is centered at (RA, dec) = (, ). This is n…
The Cosmic-Ray Composition between 2 PeV and 2 EeV Observed with the TALE Detector in Monocular Mode
Telescope Array Collaboration
We report on a measurement of the cosmic ray composition by the Telescope Array Low-Energy Extension (TALE) air fluorescence detector (FD). By making use of the Cherenkov light sig…
Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment
Telescope Array Collaboration, R. U. Abbasi, M. Abe +141
Motivated by the detection of a significant dipole structure in the arrival directions of ultrahigh-energy cosmic rays above 8 EeV reported by the Pierre Auger Observatory (Auger),…
Measurement of the Proton-Air Cross Section with Telescope Array's Black Rock Mesa and Long Ridge Fluorescence Detectors, and Surface Array in Hybrid Mode
R. U. Abbasi, M. Abe, T. Abu-Zayyad +140
Ultra high energy cosmic rays provide the highest known energy source in the universe to measure proton cross sections. Though conditions for collecting such data are less controll…
Search for Ultra-High-Energy Neutrinos with the Telescope Array Surface Detector
R. U. Abbasi, M. Abe, T. Abu-Zayyad +133
We present an upper limit on the flux of ultra-high-energy down-going neutrinos for $E > 10^{18}\ \mbox{eV}$ derived with the nine years of data collected by the Telescope Array su…
Constraints on the diffuse photon flux with energies above eV using the surface detector of the Telescope Array experiment
Telescope Array Collaboration, R. U. Abbasi, M. Abe +139
We present the results of the search for ultra-high-energy photons with nine years of data from the Telescope Array surface detector. A multivariate classifier is built upon 16 rec…
Mass composition of ultra-high-energy cosmic rays with the Telescope Array Surface Detector Data
Telescope Array Collaboration, R. U. Abbasi, M. Abe +139
The results on ultra-high-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the boosted decision tr…
The Knee and the Second Knee of the Cosmic-Ray Energy Spectrum
T. Abu-Zayyad, D. Ivanov, C. C. H. Jui +6
The cosmic ray flux measured by the Telescope Array Low Energy Extension (TALE) exhibits three spectral features: the knee, the dip in the eV decade, and the second knee.…
The Cosmic-Ray Energy Spectrum between 2 PeV and 2 EeV Observed with the TALE detector in monocular mode
R. U. Abbasi, M. Abe, T. Abu-Zayyad +137
We report on a measurement of the cosmic ray energy spectrum by the Telescope Array Low-Energy Extension (TALE) air fluorescence detector. The TALE air fluorescence detector is als…
Evidence of Intermediate-Scale Energy Spectrum Anisotropy of Cosmic Rays E10 eV with the Telescope Array Surface Detector
R. U. Abbasi, M. Abe, T. Abu-Zayyad +136
An intermediate-scale energy spectrum anisotropy has been found in the arrival directions of ultra-high energy cosmic rays of energies above eV in the northern hemisphe…
Search for Anisotropy in the Ultra High Energy Cosmic Ray Spectrum using the Telescope Array Surface Detector
R. U. Abbasi, M. Abe, T. Abu-Zayyad +127
The Telescope Array (TA) experiment is located in the western desert of Utah, USA, and observes ultra high energy cosmic rays (UHECRs) in the Northern hemisphere. At the highest en…
Search for EeV Protons of Galactic Origin
R. U. Abbasi, M. Abe, T. Abu-Zayyad +126
Cosmic rays in the energy range - eV are thought to have a light, probably protonic, composition. To study their origin one can search for anisotropy in the…
Pierre Auger Observatory and Telescope Array: Joint Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)
Telescope Array Collaboration, R. U. Abbasi, M. Abe +573
Joint contributions of the Pierre Auger Collaboration and the Telescope Array Collaboration to the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The…
Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode
R. U. Abbasi, M. Abe, T. Abu-Zayyad +122
In this work we are reporting on the measurement of the proton-air inelastic cross section using the Telescope Array (TA) detector. Based on the measurem…
Study of Ultra-High Energy Cosmic Ray Composition Using Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode
R. U. Abbasi, M. Abe, T. Abu-Zayyad +123
Previous measurements of the composition of Ultra-High Energy Cosmic Rays(UHECRs) made by the High Resolution Fly's Eye(HiRes) and Pierre Auger Observatory(PAO) are seemingly contr…
A Northern Sky Survey for Point-Like Sources of EeV Neutral Particles with the Telescope Array Experiment
R. U. Abbasi, M. Abe, T. Abu-Zayyad +122
We report on the search for steady point-like sources of neutral particles around 10 eV between 2008 May and 2013 May with the scintillator surface detector of the 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
The Telescope Array Collaboration, R. U. Abbasi, M. Abe +123
We have searched for intermediate-scale anisotropy in the arrival directions of ultrahigh-energy cosmic rays with energies above 57~EeV in the northern sky using data collected ove…
Pierre Auger Observatory and Telescope Array: Joint Contributions to the 33rd International Cosmic Ray Conference (ICRC 2013)
The Telescope Array, Pierre Auger Collaborations, : +619
Joint contributions of the Pierre Auger and Telescope Array Collaborations to the 33rd International Cosmic Ray Conference, Rio de Janeiro, Brazil, July 2013: cross-calibration of…
Search for correlations of the arrival directions of ultra-high energy cosmic ray with extragalactic objects as observed by the telescope array experiment
T. Abu-Zayyad, R. Aida, M. Allen +141
We search for correlations between positions of extragalactic objects and arrival directions of Ultra-High Energy Cosmic Rays (UHECRs) with primary energy EeV as observe…