Search for Multi-TeV gamma-ray emission from nearby SNRs with the Tibet air shower array The Tibet ASγ Collaboration

Amenomori, M.; Ayabe, S.; Cao, Peng; Ding, L. K.; Feng, Z.; Fu, Y.; Guo, H. W.; He, M.; Hibino, K.; Hotta, N.; Huang, Q.; Huo, A. X.; Izu, K.; Jia, H. Y.; Kajino, F.; Kasahara, K.; Katayose, Y.; Labaciren,; Li, J. Y.; Lü, Hou-Jun; Lu, S. L.; Luo, G. X.; Meng, X. R.; Mizutani, K.; Mu, Jun; Nanjo, H.; Nakamura, Masaki; Ohnishi, M.; Ohta, I.; Ouchi, T.; Ren, J. R.; Saito, To.; Sakata, M.; Sasaki, Takashi; Shi, Z. Z.; Shibata, M.; Shirai, T.; Sugimoto, H.; Taira, K.; Tan, Y. H.; Tateyama, N.; Torii, Shoji; Utsugi, Toshihiro; Wang, C. R.; Wang, H.; Wang, H. Y.; Wang, P. X.; Xu, Xinglong; Yamamoto, Y.; Yu, G. C.; Yuan, A. F.; Yuda, T.; Zhang, C. S.; Zhang, H. M.; Zhang, J. L.; Zhang, N. J.; Zhang, X. Y.; Zhaxisangzhu,; Zhaxiciren,; Zhou, W. D.

doi:10.1063/1.1291411

Cited by 85 publications

(142 citation statements)

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“…In the north, large-scale (> 60 • ) structures have been reported by the Tibet ASγ Collaboration [1], Super-Kamiokande [2], Milagro [3,4], EAS-TOP [5], MINOS [6], and ARGO-YBJ [7]. In the southern hemisphere, large-scale anisotropies have been observed with the IceCube detector from 20 TeV [8,9] to 2 PeV [10].…”

Section: Introductionmentioning

confidence: 99%

Measuring TeV cosmic rays at the High Altitude Water Cherenkov Observatory

BenZvi

2015

EPJ Web of Conferences

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Abstract. The High-Altitude Water Cherenkov Observatory, or HAWC, is an air shower array designed to observe cosmic rays and gamma rays between 100 GeV and 100 TeV. HAWC, located between the peaks Sierra Negra and Pico de Orizaba in central Mexico, will be completed in the spring of 2015. However, the observatory has been collecting data in a partial configuration since mid-2013. With only part of the final array in data acquisition, HAWC has already accumulated a data set of nearly 100 billion air showers. These events are used to calibrate the detector angular reconstruction using the shadow of the Moon, and to measure the anisotropy in the arrival directions of cosmic rays above 1 TeV. Using data recorded between June 2013 and July 2014, we have observed a significant 10 −4 anisotropy consisting of three statistically significant "hotspots" in the cosmic ray flux. We will discuss these first results from HAWC and compare them to previous measurements of anisotropy in the northern and southern sky.

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Section: Introductionmentioning

confidence: 99%

Measuring TeV cosmic rays at the High Altitude Water Cherenkov Observatory

BenZvi

2015

EPJ Web of Conferences

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“…In a similar way, in the cosmic ray plasma rest frame, the movement of the whole solar system around the galactic center could give rise to a similar CG effect, however, now the modulations should be seen in sidereal time. Analysis in the ∼ 300 TeV range [10] showed no such modulations, indicating that at theses energies, cosmic rays corotate with the solar system trapped by the local galactic field inside the arm.…”

Section: Introductionmentioning

confidence: 99%

“…ergies [5,6,7,8]. For energies ∼ 10 11 eV, explored mainly by shallow underground muon detectors, cosmic rays are believed to be modulated by solar magnetic fields, whereas for energies ∼ 10 14 eV, dominated by EAS arrays, the primaries will feel essentially the local structure of the galactic magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Estimating a cosmic ray detector exposure sky map under the hypothesis of seasonal and diurnal effects factorization

Santos

Bonifazi

Letessier‐Selvon

2008

Astroparticle Physics

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The measurement of large scale patterns or anisotropies in the arrival direction of high energy cosmic rays is an important step towards the understanding of their origin. Such measurements rely on an accurate estimation of the detector relative exposure in each direction on the sky: the coverage map. To reach an accuracy on the determination of this map below the 1% level one must properly identify and correct for all the environmental effects that may induce variations in the detector exposure as a function of time. In an approach, similar to the one used in anti-sidereal time analysis, we propose a method to empirically estimate and correct for those effects under the hypothesis that seasonal and diurnal variations can be factorized. We tested this method using a model ground detector of cosmic ray air showers, whose aperture varies due to the dependence of the air shower development on the atmospheric conditions.

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“…Also, fluctuations in the number of particles will be smaller in case of heavy primary nuclei. Major experiments performing particle measurements at ground in the energy range of the knee include CASA-MIA [12], EAS-TOP [13], HEGRA [14], KAS-CADE [15,16], and Tibet-ASγ [17], only the latter two of which currently take data. Most of the data in the gzk energy range are based on the Akeno Giant-Air-ShowerExperiment (AGASA) [18].…”

Section: Extensive Air Showers and Experimental Observablesmentioning

confidence: 99%

Methods of determination of the energy and mass of primary cosmic ray particles at extensive air shower energies

Kampert¹

2001

J. Phys. G: Nucl. Part. Phys.

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Abstract. Measurements of cosmic ray particles at energies above E > ∼ 5 · 10 14 eV are performed by large area ground based air shower experiments. Only they provide the collection power required for obtaining sufficient statistics at the low flux levels involved. In this review we briefly outline the physics and astrophysics interests of such measurements and discuss in more detail various experimental techniques applied for reconstructing the energy and mass of the primary particles. These include surface arrays of particle detectors as well as observations of Cherenkov-and of fluorescence light. A large variety of air shower observables is then reconstructed from such data and used to infer the properties of the primary particles via comparisons to air shower simulations. Advantages, limitations, and systematic uncertainties of different approaches will be critically discussed.

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Search for Multi-TeV gamma-ray emission from nearby SNRs with the Tibet air shower array The Tibet ASγ Collaboration

Cited by 85 publications

References 0 publications

Measuring TeV cosmic rays at the High Altitude Water Cherenkov Observatory

Measuring TeV cosmic rays at the High Altitude Water Cherenkov Observatory

Estimating a cosmic ray detector exposure sky map under the hypothesis of seasonal and diurnal effects factorization

Methods of determination of the energy and mass of primary cosmic ray particles at extensive air shower energies

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