Upper Limit on Gamma-Ray Flux above 10[TSUP]19[/TSUP] [CLC]e[/CLC]V Estimated by the Akeno Giant Air Shower Array Experiment

Shinozaki, K.; Chikawa, M.; Fukushima, M.; Hayashida, N.; Inoue, N.; Honda, K.; Kadota, K.; Kakimoto, F.; Kamata, K.; Kawaguchi, S.; Kawakami, S.; Kawasaki, Y.; Kawasumi, N.; Mahrous, A.; Mase, K.; Mizobuchi, S.; Morizane, Y.; Nagano, M.; Ohoka, H.; Osone, S.; Sakaki, N.; Sakurai, N.; Sasaki, M.; Sasano, M.; Takeda, M.; Teshima, M.; Tsushima, I.; Torii, R.; Uchihori, Y.; Vázquez, R. A.; Yamamoto, Tokonatsu; Yoshida, Shigeru; Yoshii, H.

doi:10.1086/341288

Cited by 114 publications

(31 citation statements)

References 19 publications

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“…7. Also shown in this same figure are previous results from the Pierre Auger Observatory (Hyb and SD 2008), marked in blue and gray arrows [24], together with results from Telescope Array (TA) [25], Yakutsk (Y) [26], Haverah Park (HP) [27], AGASA (A) [28], as well as with predictions from…”

Section: Pos(multif15)025supporting

confidence: 61%

Reviewing the latest results from the Pierre Auger Observatory

Dobrigkeit

2016

Proceedings of XI Multifrequency Behaviour of High Energy Cosmic Sources Workshop — PoS(MULTIF15)

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We report on the latest results from the Pierre Auger Observatory in its continuing mission of studying cosmic rays in the highest-energy region observed to date. Operating now for more than ten years, the data collected with the Auger Observatory have already led to major breakthroughs in our knowledge about these very rare particles. We mention specifically some recent results of data analyses performed involving their energy spectrum, mass composition, arrival direction distributions, and searches for neutral messengers like neutrinos, photons, and neutrons. Finally, in the light of the latest findings, we discuss the plans for the next challenges to be faced by the Collaboration with the goal of unraveling the main features of cosmic rays in the energy region of the flux suppression.

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Section: Pos(multif15)025supporting

confidence: 61%

Reviewing the latest results from the Pierre Auger Observatory

Dobrigkeit

2016

Proceedings of XI Multifrequency Behaviour of High Energy Cosmic Sources Workshop — PoS(MULTIF15)

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“…The present status is that no observation of photons has been claimed above 10 18 eV by any experiment. The main candidates reported by both older experiments, like AGASA [6] and Yakutsk [7], or the newer Pierre Auger Observatory (Auger hereafter) [8] and Telescope Array (T.A.) [9], are all compatible with the expected fluctuations of a pure sample of very deep proton shower events.…”

Section: Introductionmentioning

confidence: 78%

Improving photon-hadron discrimination based on cosmic ray surface detector data

Ros¹,

Supanitsky²,

Medina‐Tanco³

et al. 2013

Astroparticle Physics

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The search for photons at EeV energies and beyond has considerable astrophysical interest and will remain one of the key challenges for ultra-high energy cosmic ray (UHECR) observatories in the near future. Several upper limits to the photon flux have been established since no photon has been unambiguously observed up to now. An improvement in the reconstruction efficiency of the photon showers and/or better discrimination tools are needed to improve these limits apart from an increase in statistics. Following this direction, we analyze in this work the ability of the surface parameter Sb, originally proposed for hadron discrimination, for photon search. Semi-analytical and numerical studies are performed in order to optimize Sb for the discrimination of photons from a proton background in the energy range from 10^18.5 to 10^19.6 eV. Although not shown explicitly, the same analysis has been performed for Fe nuclei and the corresponding results are discussed when appropriate. The effects of different array geometries and the underestimation of the muon component in the shower simulations are analyzed, as well as the Sb dependence on primary energy and zenith angle.Fil: Ros, G.. Universidad de Alcala. Facultad de Ciencias; EspañaFil: Supanitsky, Alberto Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Medina Tanco, G. A.. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; MéxicoFil: del Peral, L.. Universidad de Alcala. Facultad de Ciencias; EspañaFil: Rodríguez Frías, M. D.. Universidad de Alcala. Facultad de Ciencias; Españ

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“…10 14 -5 . 10 16 eV, and Haverah Park [9], AGASA [10] [12], Yakutsk [13], [14], Pierre Auger [15], [16], and Telescope Array [17] at energies higher than 10 18 eV) yielded only upper limits on the fluxes of cosmic gamma rays.…”

Section: Introductionmentioning

confidence: 99%

Search for diffuse cosmic gamma rays of energy E_γ> 100 TeV with the Carpet-3 air shower array

Dzhappuev

Petkov

Lidvansky

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. An experiment for measuring the flux of gamma rays of cosmic origin with energy above 100 TeV is currently being prepared at the Baksan Neutrino Observatory (the Carpet-3 experiment). The experiment performance will be accomplished after radical modernization of the existing array by substantially increasing areas of both the muon detector and ground level shower array. In this work some results of calculations of efficiency of the experiment for showers from primary gamma rays are presented for different configurations of the array. It is demonstrated that by increasing the muon detector area up to 615 m 2 (the maximum possible value) one can reach with Carpet-3 the world-best sensitivity to 100 TeV gamma rays. The preliminary values of upper limits on the flux of cosmic diffuse gamma rays with energy higher than 1.3 PeV are also presented, derived from experimental data of the Carpet-2 shower array for a net exposure time of 9.2 years. IntroductionSearch for primary gamma rays of energies higher than 100 TeV using the extensive air shower (EAS) method started in 1960s. As opposed to cosmic rays (protons and nuclei of heavier elements) that are charged particles and deflect in interstellar magnetic fields, the primary gamma rays can give information about the spatial distribution and characteristics of places of acceleration of cosmic rays, as well as about the density of cosmic rays in the interstellar space. Investigation of diffuse gamma rays at such energies is carried out by the EAS method in experiments in which one can separate the showers produced by primary photons and nuclei. Such a separation is possible due to the fact that showers from primary photons are essentially less abundant with hadrons (and, as a result, they are muon-poor) in comparison with showers from primary protons and nuclei. Thus, if one selects hadronpoor or muon-poor EAS, there is a hope to effectively distinguish between the showers produced by primary gamma rays and by nuclei. Maze and Zavadski [1] were the first who put forward the idea of searching for high-energy gamma rays by way of detecting muon-poor showers. 18 eV) yielded only upper limits on the fluxes of cosmic gamma rays. In all these experiments only upper limits on the fluxes have been obtained, that appeared to be much lower than the fluxes of diffuse cosmic gamma rays supposedly measured in

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Upper Limit on Gamma-Ray Flux above 10[TSUP]19[/TSUP] [CLC]e[/CLC]V Estimated by the Akeno Giant Air Shower Array Experiment

Cited by 114 publications

References 19 publications

Reviewing the latest results from the Pierre Auger Observatory

Reviewing the latest results from the Pierre Auger Observatory

Improving photon-hadron discrimination based on cosmic ray surface detector data

Search for diffuse cosmic gamma rays of energy E_γ> 100 TeV with the Carpet-3 air shower array

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Upper Limit on Gamma-Ray Flux above 10[TSUP]19[/TSUP] [CLC]e[/CLC]V Estimated by the Akeno Giant Air Shower Array Experiment

Cited by 114 publications

References 19 publications

Reviewing the latest results from the Pierre Auger Observatory

Reviewing the latest results from the Pierre Auger Observatory

Improving photon-hadron discrimination based on cosmic ray surface detector data

Search for diffuse cosmic gamma rays of energy Eγ> 100 TeV with the Carpet-3 air shower array

Contact Info

Product

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Search for diffuse cosmic gamma rays of energy E_γ> 100 TeV with the Carpet-3 air shower array