Mass composition of cosmic rays with energy above $10^{17}$ eV according to the data of surface detectors of Yakutsk EAS array

Sabourov, A. V.; Glushkov, A.V.; Правдин, М. И.; Egorov, Yuri; Иванов, А. А.; Кнуренко, С. П.; Mokhnachevskaya, Valentina; Petrov, Igor; Timofeev, Lev

doi:10.22323/1.301.0553

Cited by 4 publications

(6 citation statements)

References 13 publications

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“…Comparison with the results of other experiments for QGSJET II-03 is shown in Figure 2. We compare our results with the TA MD hybrid composition results [20], with the Pierre Auger Observatory and risetime asymmetry results [21], with the HiRes stereo [2] results and with the Yakutsk results [22] based on the QGSJET II-03 model. Comparison with the results of other experiments for QGSJET II-04 is shown in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 2: ln values for 12-year dataset derived with QGSJET II-03 (black crosses) compared with TA MD (upper left, green circles)[20] and TA SD 9 year results (red circles) [24], with the Pierre Auger Observatory and risetime asymmetry results (upper right, blue squares and red triangles)[21], with the HiRes stereo results (lower left, orange triangles)[2] and with the Yakutsk results (lower right, green squares)[22].…”

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confidence: 99%

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Cosmic-ray mass composition with the TA SD 12-year data

Zhezher¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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Telescope Array (TA) is the largest ultra-high-energy cosmic-ray (UHECR) observatory in the Northern Hemisphere. It is dedicated to detect extensive air showers (EAS) in hybrid mode, both by measuring the shower's longitudinal profile with fluorescence telescopes and their particle footprint on the ground from the surface detector (SD) array. While fluorescence telescopes can measure the most composition-sensitive characteristic of EAS, the depth of the shower maximum (X max ), they also have the drawback of small duty cycle. This work aims to study the UHECR composition based solely on the surface detector data. For this task, a set of composition-sensitive observables obtained from the SD data is used in a machine-learning method -the Boosted Decision Trees. We will present the results of the UHECR mass composition based on the 12-year data from the TA SD using this technique, and we will discuss of the possible systematics imposed by the hadronic interaction models.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Cosmic-ray mass composition with the TA SD 12-year data

Zhezher¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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“…The energy spectrum of CRs, as measured using the EAS array, essentially depends on the accuracy of the primary energy estimation method. The latest improvement in the algorithm used by the Yakutsk array group was reported recently [17]. The resultant energy spectrum combined with data from the Cherenkov detectors [18] is shown in the left panel of Fig.…”

Section: The Astrophysics Of Uhecrmentioning

confidence: 99%

Some results from the Yakutsk array experiment and the status of the modernization program

Иванов

2019

EPJ Web Conf.

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“…Several algorithms have been developed in the Yakutsk array group to evaluate the energy of the primary particle initiating EAS [15][16][17][18]. In this paper, the most recent method proposed in [19] is used. Namely, the primary energy is estimated as in the SIBYLL-2.1 model [20]:…”

Section: The Yakutsk Array Data Acquisition and Selection For Analysismentioning

confidence: 99%

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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Mass composition of cosmic rays with energy above $10^{17}$ eV according to the data of surface detectors of Yakutsk EAS array

Cited by 4 publications

References 13 publications

Cosmic-ray mass composition with the TA SD 12-year data

Cosmic-ray mass composition with the TA SD 12-year data

Some results from the Yakutsk array experiment and the status of the modernization program

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

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