Analysis of anisotropy of cosmic rays with the energy of about 1017 eV by Yakutsk EAS array data

Правдин, М. И.; Иванов, А. А.; Krasilnikov, A. D.; Михайлов, А. А.; Sleptsov, I. E.

doi:10.1134/1.1378167

Cited by 12 publications

(12 citation statements)

References 3 publications

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“…This is in agreement with an analysis of more than 135,000 showers of the Yakutsk array with energies from 3 × 10 16 to 3 × 10 17 eV [88], which finds a dipole amplitude that is compatible with full isotropy.…”

Section: Large Scale Anisotropysupporting

confidence: 86%

Experimental results: an update

Engel¹,

Klages²

2004

Comptes Rendus. Physique

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Section: Large Scale Anisotropysupporting

confidence: 86%

Experimental results: an update

Engel¹,

Klages²

2004

Comptes Rendus. Physique

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“…Constraints on the anisotropy of arrival directions in the range were set using harmonic analysis [32][33][34] and the South-North method [35]. The stringent upper limit for the first harmonic amplitude was 0.1% at a primary energy of 7 × 10 14 eV and 1.25% at around E ≈ 1 EeV.…”

Section: A Measured Zenith Angle Distributions and Those Expected Fomentioning

confidence: 99%

“…In the energy region above 10 18 eV, the observed distribution of arrival directions is in agreement with isotropic expectation, in harmony with previous results [10,35], while in the interval (10 17 , 10 18 ) eV there is an explicit deviation from isotropy. Pravdin et al [32] revealed that the effect is a result of irregular observation conditions and seasonal variations of the EAS event rate. More detailed analysis is required to distinguish a real anisotropy of astrophysical origin from seasonal and observational artifacts.…”

Section: A Comparing Measured and Expected Arrival Directionsmentioning

confidence: 99%

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Zenith angle distribution of cosmic ray showers measured with the Yakutsk array and its application to the analysis of arrival directions in equatorial coordinates

Иванов

2018

Phys. Rev. D

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The Yakutsk array dataset in the energy interval (10 17 , 10 19 ) eV is revisited in order to interpret the zenith angle distribution of an extensive air shower event rate of ultra-high energy cosmic rays. The close relation of the distribution to the attenuation of the main measurable parameter of showers, S600, is examined. Measured and expected distributions are used to analyze the arrival directions of cosmic rays on an equatorial map including the energy range below 10 18 eV, which was previously avoided due to the reduced trigger efficiency of the array in the range. While the null hypothesis cannot be rejected with data from the Yakutsk array, an upper limit on the fraction of cosmic rays from a separable source in the uniform background is derived as a function of declination and energy.PACS numbers: 96.50.S-, 96.50.sd

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“…The efficiency of array detection is affected by weather, shutdowns of detectors, the geomagnetic modulation of the EAS event rate, and so on (Ivanov et al 1999(Ivanov et al , 2007Pravdin et al 2001). Attenuation of showers in the atmosphere results in a deviation from the "isotropic" zenith angle distribution, f i , at low energies.…”

Section: Exposure Of the Ground Eas Array For Celestial Regionsmentioning

confidence: 99%

Optimal recovery of values of functions and their derivatives from inaccurate data on the Fourier transform

Magaril-Il'yaev¹,

Osipenko²

2004

Sb. Math.

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This paper presents the results of searches for anisotropy in the arrival directions of ultra-high-energy cosmic rays (CRs) detected with the Yakutsk Array during the 1974-2008 observational period as well as searches in available data from other giant extensive air shower arrays working at present. A method of analysis based on a comparison of the minimum width of distributions in equatorial coordinates is used. As a result, a hypothesis of isotropy in arrival directions is rejected at the 99.5% significance level. The observed decrease in the minimum width of the distribution can be explained by the presence of CR sources in energy intervals and sky regions according to recent indications inferred from data of the Yakutsk Array and Telescope Array experiments.

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Analysis of anisotropy of cosmic rays with the energy of about 1017 eV by Yakutsk EAS array data

Cited by 12 publications

References 3 publications

Experimental results: an update

Experimental results: an update

Zenith angle distribution of cosmic ray showers measured with the Yakutsk array and its application to the analysis of arrival directions in equatorial coordinates

Optimal recovery of values of functions and their derivatives from inaccurate data on the Fourier transform

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