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1. Observation of Gamma Rays up to 320 TeV from the Middle-aged TeV Pulsar Wind Nebula HESS J1849−000

Author

M. Amenomori, S. Asano, Y. W. Bao, X. J. Bi, D. Chen, T. L. Chen, W. Y. Chen, Xu Chen, Y. Chen, Cirennima, S. W. Cui, Danzengluobu, L. K. Ding, J. H. Fang, K. Fang, C. F. Feng, Zhaoyang Feng, Z. Y. Feng, Qi Gao, A. Gomi, Q. B. Gou, Y. Q. Guo, Y. Y. Guo, Y. Hayashi, H. H. He, Z. T. He, K. Hibino, N. Hotta, Haibing Hu, H. B. Hu, K. Y. Hu, J. Huang, H. Y. Jia, L. Jiang, P. Jiang, H. B. Jin, K. Kasahara, Y. Katayose, C. Kato, S. Kato, I. Kawahara, T. Kawashima, K. Kawata, M. Kozai, D. Kurashige, Labaciren, G. M. Le, A. F. Li, H. J. Li, W. J. Li, Y. Li, Y. H. Lin, B. Liu, C. Liu, J. S. Liu, L. Y. Liu, M. Y. Liu, W. Liu, H. Lu, X. R. Meng, Y. Meng, K. Munakata, K. Nagaya, Y. Nakamura, Y. Nakazawa, H. Nanjo, C. C. Ning, M. Nishizawa, R. Noguchi, M. Ohnishi, S. Okukawa, S. Ozawa, X. Qian, X. L. Qian, X. B. Qu, T. Saito, Y. Sakakibara, M. Sakata, T. Sako, T. K. Sako, T. Sasaki, J. Shao, M. Shibata, A. Shiomi, H. Sugimoto, W. Takano, M. Takita, Y. H. Tan, N. Tateyama, S. Torii, H. Tsuchiya, S. Udo, H. Wang, S. F. Wang, Y. P. Wang, Wangdui, H. R. Wu, Q. Wu, J. L. Xu, L. Xue, Z. Yang, Y. Q. Yao, J. Yin, Y. Yokoe, Y. L. Yu, A. F. Yuan, L. M. Zhai, H. M. Zhang, J. L. Zhang, X. Zhang, X. Y. Zhang, Y. Zhang, Yi Zhang, Ying Zhang, S. P. Zhao, Zhaxisangzhu, X. X. Zhou, and Y. H. Zou

Subjects
Galactic cosmic rays, Pulsar wind nebulae, Gamma-ray sources, Gamma-ray astronomy, Gamma-ray observatories, Astrophysics, QB460-466
Abstract

Gamma rays from HESS J1849−000, a middle-aged TeV pulsar wind nebula (PWN), are observed by the Tibet air shower array and the muon detector array. The detection significance of gamma rays reaches 4.0 σ and 4.4 σ levels above 25 TeV and 100 TeV, respectively, in units of the Gaussian standard deviation σ . The energy spectrum measured between 40 TeV < E < 320 TeV for the first time is described with a simple power-law function of ${dN}/{dE}={(2.86\pm 1.44)\times {10}^{-16}(E/40\,\mathrm{TeV})}^{-2.24\pm 0.41}\,{\mathrm{TeV}}^{-1}\,{\mathrm{cm}}^{-2}\,{{\rm{s}}}^{-1}$ . The gamma-ray energy spectrum from the sub-TeV ( E < 1 TeV) to sub-PeV (100 TeV < E < 1 PeV) ranges, including the results of previous studies, can be modeled with the leptonic scenario, i.e., inverse Compton scattering by high-energy electrons accelerated by the PWN of PSR J1849−0001. On the other hand, the gamma-ray energy spectrum can also be modeled with the hadronic scenario in which gamma rays are generated from the decay of neutral pions produced by collisions between accelerated cosmic-ray protons and the ambient molecular cloud found in the gamma-ray-emitting region. The cutoff energy of cosmic-ray protons E _p,cut is estimated as ${\mathrm{log}}_{10}({E}_{{\rm{p}},\mathrm{cut}}/\mathrm{TeV})={3.73}_{-0.66}^{+2.98}$ , suggesting that protons are accelerated up to the PeV energy range. Our study thus proposes that HESS J1849−000 should be further investigated as a new candidate as a Galactic PeV cosmic-ray accelerator, or “PeVatron.”

Published
2023
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2. Measurement of the Gamma-Ray Energy Spectrum beyond 100 TeV from the HESS J1843–033 Region

Author

M. Amenomori, S. Asano, Y. W. Bao, X. J. Bi, D. Chen, T. L. Chen, W. Y. Chen, Xu Chen, Y. Chen, null Cirennima, S. W. Cui, null Danzengluobu, L. K. Ding, J. H. Fang, K. Fang, C. F. Feng, Zhaoyang Feng, Z. Y. Feng, Qi Gao, A. Gomi, Q. B. Gou, Y. Q. Guo, Y. Y. Guo, H. H. He, Z. T. He, K. Hibino, N. Hotta, Haibing Hu, H. B. Hu, K. Y. Hu, J. Huang, H. Y. Jia, L. Jiang, P. Jiang, H. B. Jin, K. Kasahara, Y. Katayose, C. Kato, S. Kato, T. Kawashima, K. Kawata, M. Kozai, D. Kurashige, null Labaciren, G. M. Le, A. F. Li, H. J. Li, W. J. Li, Y. Li, Y. H. Lin, B. Liu, C. Liu, J. S. Liu, L. Y. Liu, M. Y. Liu, W. Liu, X. L. Liu, Y.-Q. Lou, H. Lu, X. R. Meng, Y. Meng, K. Munakata, K. Nagaya, Y. Nakamura, Y. Nakazawa, H. Nanjo, C. C. Ning, M. Nishizawa, M. Ohnishi, S. Okukawa, S. Ozawa, L. Qian, X. Qian, X. L. Qian, X. B. Qu, T. Saito, Y. Sakakibara, M. Sakata, T. Sako, T. K. Sako, J. Shao, M. Shibata, A. Shiomi, H. Sugimoto, W. Takano, M. Takita, Y. H. Tan, N. Tateyama, S. Torii, H. Tsuchiya, S. Udo, H. Wang, Y. P. Wang, null Wangdui, H. R. Wu, Q. Wu, J. L. Xu, L. Xue, Z. Yang, Y. Q. Yao, J. Yin, Y. Yokoe, N. P. Yu, A. F. Yuan, L. M. Zhai, C. P. Zhang, H. M. Zhang, J. L. Zhang, X. Zhang, X. Y. Zhang, Y. Zhang, Yi Zhang, Ying Zhang, S. P. Zhao, null Zhaxisangzhu, and X. X. Zhou

Subjects
Space and Planetary Science, Astronomy and Astrophysics
Abstract

HESS J1843–033 is a very high energy gamma-ray source whose origin remains unidentified. This work presents, for the first time, the energy spectrum of gamma rays beyond 100 TeV from the HESS J1843–033 region using the data recorded by the Tibet air shower array and its underground muon detector array. A gamma-ray source with an extension of 0.°34 ± 0.°12 is successfully detected above 25 TeV at (α, δ) = (281.°09 ± 0.°10, −3.°76 ± 0.°09) near HESS J1843–033 with a statistical significance of 6.2σ, and the source is named TASG J1844–038. The position of TASG J1844–038 is consistent with those of HESS J1843–033, eHWC J1842–035, and LHAASO J1843–0338. The measured gamma-ray energy spectrum in 25 TeV < E < 130 TeV is described with dN / dE = ( 9.70 ± 1.89 ) × 10 − 16 (E/40 TeV)−3.26±0.30 TeV−1 cm−2 s−1, and the spectral fit to the combined spectra of HESS J1843–033, LHAASO J1843–0338, and TASG J1844–038 implies the existence of a cutoff at 49.5 ± 9.0 TeV. Associations of TASG J1844–038 with SNR G28.6–0.1 and PSR J1844–0346 are also discussed in detail for the first time.

Published
2022

3. First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies

Author

Takashi Sako, X. R. Meng, X. L. Qian, Zhaoyang Feng, K. Kawata, Zicai Yang, L. Xue, Haibing Hu, Hong-peng Lu, Yu-Lei Chen, N. Tateyama, Harufumi Tsuchiya, Z. T. He, X. Y. Zhang, Minghui Liu, msub, W. J. Li, Y. Zhang, T. L. Chen, M. Amenomori, W. Y. Chen, A. Shiomi, K. Fang, M. Sakata, M. Shibata, Gui-Ming Le, H. M. Zhang, X. X. Zhou, Qi Gao, A. F. Yuan, M. Ohnishi, S. Ozawa, H. Sugimoto, Masaki Nishizawa, Y. H. Lin, Cirennima, S. Udo, mrow, T. Ohura, L. K. Ding, C. F. Feng, L. M. Zhai, Ang Li, X. J. Bi, Y. Ko, L. L. Jiang, Yongjun Bao, Y. Nakamura, Z. Y. Feng, H. B. Hu, H. Y. Jia, Masayoshi Kozai, Yang Guo, H. B. Jin, Jian Huang, Jia Zhang, Labaciren, Shoji Torii, Y. Q. Guo, Y. H. Tan, Zhaxisangzhu, Y. Yokoe, Huaguang Wang, H. J. Li, Donghong Chen, Y. Q. Lou, H. R. Wu, H. H. He, Shi-Ping Zhao, Q. B. Gou, Masato Takita, Chihiro Kato, K. Hibino, mrow> γ, Yi Zhang, J. Fang, C. X. Liu, J. S. Liu, Wenwei Liu, Y. Yamamoto, H. Nakada, H. Nanjo, Ying Zhang, S. W. Cui, X. B. Qu, B. Liu, W. Kihara, J. Shao, To. Saito, Danzengluobu, Katsuaki Kasahara, Y. Katayose, Xu Chen, Shigeaki Kato, Xiang Zhang, N. Hotta, Kazuoki Munakata, and W. Takano

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Gamma ray, FOS: Physical sciences, General Physics and Astronomy, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Interstellar medium, 0103 physical sciences, High Energy Physics::Experiment, Disc, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, Astrophysics::Galaxy Astrophysics
Abstract

We report, for the first time, the long-awaited detection of diffuse gamma rays with energies between 100 TeV and 1 PeV in the Galactic disk. Particularly, all gamma rays above 398 TeV are observed apart from known TeV gamma-ray sources and compatible with expectations from the hadronic emission scenario in which gamma rays originate from the decay of $\pi^0$'s produced through the interaction of protons with the interstellar medium in the Galaxy. This is strong evidence that cosmic rays are accelerated beyond PeV energies in our Galaxy and spread over the Galactic disk., Comment: Accepted for publication in the Physical Review Letters

Published
2021

4. Gamma-Ray Observation of the Cygnus Region in the 100-TeV Energy Region

Author

Lihe Qian, H. H. He, Shi-Ping Zhao, Jia Zhang, J. Fang, Xi Liu, Yun-Hui Li, Donghong Chen, Y. Yamamoto, Q. Wu, J. S. Liu, mrow, H. M. Zhang, W. Takano, Wangdui, T. Ohura, X. X. Zhou, Takashi Sako, Ang Li, H. Sugimoto, L. K. Ding, H. Nakada, Z. Y. Feng, Huaguang Wang, Y. Yokoe, S. Ozawa, T. K. Sako, J. H. Yin, A. F. Yuan, H. Nanjo, N. P. Yu, X. L. Qian, Z. T. He, Kun Fang, Shoji Torii, C. C. Ning, M. Sakata, X. B. Qu, Peng Jiang, Y. H. Lin, T. L. Chen, X. R. Meng, Jian Huang, Gui-Ming Le, Y. P. Wang, Zhaxisangzhu, mrow> γ, Yu-Lei Chen, Yi Zhang, Zhaoyang Feng, Yongjun Bao, D. Kurashige, S. Okukawa, Chihiro Kato, L. Xue, Xiao-Feng Qian, Jun Xu, W. Y. Chen, Labaciren, Y. Q. Guo, H. B. Hu, Haibing Hu, Zicai Yang, Hong-peng Lu, N. Hotta, C. X. Liu, Wenwei Liu, H. J. Li, Y. Q. Lou, H. R. Wu, X. Y. Zhang, Minghui Liu, Masayoshi Kozai, msub, W. J. Li, Q. B. Gou, Y. Zhang, Masato Takita, A. Shiomi, M. Ohnishi, M. Shibata, N. Tateyama, Cirennima, Y. H. Tan, K. Kawata, S. Udo, M. Amenomori, H. B. Jin, Liyu Liu, Harufumi Tsuchiya, Masaki Nishizawa, Chuang Zhang, A. Gomi, C. F. Feng, Kazuoki Munakata, X. J. Bi, Ying Zhang, L. L. Jiang, S. W. Cui, Qi Gao, L. M. Zhai, Yang Guo, K. Hibino, B. Liu, Danzengluobu, Y. Q. Yao, J. Shao, H. Y. Jia, Y. Katayose, Shigeaki Kato, To. Saito, Katsuaki Kasahara, Xu Chen, Y. Nakazawa, Yoshimichi Nakamura, and Xiang Zhang

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, General Physics and Astronomy, Centroid, Astrophysics, Pulsar wind nebula, Galaxy, Particle acceleration, Pulsar, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics, Energy (signal processing)
Abstract

We report observations of gamma-ray emissions with energies in the 100 TeV energy region from the Cygnus region in our Galaxy. Two sources are significantly detected in the directions of the Cygnus OB1 and OB2 associations. Based on their positional coincidences, we associate one with a pulsar PSR J2032+4127 and the other mainly with a pulsar wind nebula PWN G75.2+0.1 with the pulsar moving away from its original birthplace situated around the centroid of the observed gamma-ray emission. This work would stimulate further studies of particle acceleration mechanisms at these gamma-ray sources., Accepted for publication in the Physical Review Letters

Published
2021

5. Potential PeVatron supernova remnant G106.3+2.7 seen in the highest-energy gamma rays

Author

Yu-Lei Chen, Y. Yamamoto, N. Hotta, X. L. Qian, Hsiao-Chi Lu, Jian Huang, J. Shao, M. Shibata, H. Nakada, Masaki Nishizawa, X. J. Bi, M. Takita, Yi Zhang, Q. B. Gou, C. F. Feng, Y. Ko, L. Xue, Xu Chen, Yongjun Bao, J. S. Liu, L. L. Jiang, Kun Fang, Zicai Yang, Huaguang Wang, T. Ohura, Kazuoki Munakata, L. K. Ding, Haibing Hu, K. Kasahara, W. J. Li, Y. Yokoe, W. Takano, W. Kihara, Xuan Zhang, Labaciren, H. H. He, K. Kawata, Ying Zhang, Z. Y. Feng, B. Liu, Shi-Ping Zhao, W. Y. Chen, S. Ozawa, Jia Zhang, S. Torii, Y. Zhang, H. Nanjo, S. W. Cui, Takeshi Saito, J. Fang, A. Shiomi, Donghong Chen, Qi Gao, M. Amenomori, L. M. Zhai, Yang Guo, H. M. Zhang, X. X. Zhou, Z. T. He, H. Sugimoto, Danzengluobu, Y. H. Tan, Y. Q. Guo, T. L. Chen, Chihiro Kato, H. Y. Jia, H. J. Li, Y. Q. Lou, H. R. Wu, H. B. Jin, C. X. Liu, Wenwei Liu, M. Ohnishi, A. F. Yuan, Cirennima, S. Udo, Y. Katayose, Shigeaki Kato, Y. Nakamura, N. Tateyama, Harufumi Tsuchiya, M. Sakata, Gui-Ming Le, H. B. Hu, Masayoshi Kozai, Y. H. Lin, K. Hibino, Ang Li, X. B. Qu, X. R. Meng, Zhaoyang Feng, Zhaxisangzhu, T. K. Sako, X. Y. Zhang, and Minghui Liu

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Electron, Synchrotron, law.invention, Particle acceleration, Pulsar, law, Atomic nucleus, Physics::Accelerator Physics, High Energy Physics::Experiment, Supernova remnant, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Cosmic rays (protons and other atomic nuclei) are believed to gain energies of petaelectronvolts (PeV) and beyond at astrophysical particle accelerators called 'PeVatrons' inside our Galaxy. Although a characteristic feature of a PeVatron is expected to be a hard gamma-ray energy spectrum that extends beyond 100 teraelectronvolts (TeV) without a cutoff, none of the currently known sources exhibits such a spectrum due to the low maximum energy of accelerated cosmic rays or insufficient detector sensitivity around 100 TeV. Here we report the observation of gamma-ray emission from the supernova remnant G106.3+2.7 above 10 TeV. This work provides flux data points up to and above 100 TeV and indicates that the very-high-energy gamma-ray emission above 10 TeV is well correlated with a molecular cloud rather than the pulsar PSR J2229+6114. Regarding the gamma-ray emission mechanism of G106.3+2.7, this morphological feature appears to favor a hadronic origin via the {\pi}0 decay caused by accelerated relativistic protons over a leptonic one via the inverse-Compton scattering by relativistic electrons. Furthermore, we point out that an X-ray flux upper limit on the synchrotron spectrum would provide important information to firmly establish the hadronic scenario as the mechanism of particle acceleration at the source., Comment: Published in Nature Astronomy

Published
2021
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6. Evaluation of the Interplanetary Magnetic Field Strength Using the Cosmic-Ray Shadow of the Sun

Author

T. Miyazaki, H. Nanjo, T. Shirai, Zicai Yang, J. Shao, Donghong Chen, Yoshihiko Nakamura, X. L. Qian, I. Ohta, Chihiro Kato, Labaciren, H. M. Zhang, X. X. Zhou, Jian Liu, Y. Yamamoto, H. H. He, Z. T. He, M. Ohnishi, H. Sugimoto, Zhenyong Feng, Liming Ding, K. Kasahara, M. Sakata, C. X. Liu, Q. B. Gou, Masato Takita, S. Udo, Shoji Torii, K. Kawata, M. Amenomori, Gui-Ming Le, T. L. Chen, Jing Huang, M. Shibata, Ying Zhang, S. W. Cui, K. Hibino, Jia Zhang, Haibing Hu, T. Yuda, Danzengluobu, Masaki Nishizawa, Wei Li, A. F. Yuan, N. Tateyama, C. F. Feng, Takashi Saito, Harufumi Tsuchiya, Huaguang Wang, T. Niwa, Y. Zhang, L. Xue, L. L. Jiang, Yi Zhang, Takashi Sako, Ang Li, Wei Chen, A. Shiomi, Masayoshi Kozai, Hong-peng Lu, Y. Q. Guo, Y. H. Tan, X. R. Meng, H. J. Li, Zhaxisangzhu, H. R. Wu, L. M. Zhai, X. B. Qu, Zhaoyang Feng, X. J. Bi, H. Y. Jia, Kazuoki Munakata, Hui Hu, N. Hotta, K. Mizutani, Y. Katayose, S. Ozawa, X. Y. Zhang, Minghui Liu, K. Yamauchi, To. Saito, F. Kajino, and T. Nakajima

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Physics, Model prediction, Center (category theory), FOS: Physical sciences, General Physics and Astronomy, Cosmic ray, Astrophysics, Solar disk, 01 natural sciences, Space Physics (physics.space-ph), Magnetic field, Air shower, Astrophysics - Solar and Stellar Astrophysics, Physics - Space Physics, Physics::Space Physics, 0103 physical sciences, Shadow, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Interplanetary magnetic field, 010306 general physics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics - Earth and Planetary Astrophysics
Abstract

We analyze the Sun's shadow observed with the Tibet-III air shower array and find that the shadow's center deviates northward (southward) from the optical solar disc center in the "Away" ("Toward") IMF sector. By comparing with numerical simulations based on the solar magnetic field model, we find that the average IMF strength in the "Away" ("Toward") sector is $1.54 \pm 0.21_{\rm stat} \pm 0.20_{\rm syst}$ ($1.62 \pm 0.15_{\rm stat} \pm 0.22_{\rm syst}$) times larger than the model prediction. These demonstrate that the observed Sun's shadow is a useful tool for the quantitative evaluation of the average solar magnetic field., 7 pages, 4 figures

Published
2018

7. Influence of Earth-Directed Coronal Mass Ejections on the Sun's Shadow Observed by the Tibet-III Air Shower Array

Author

T. K. Sako, H. Nanjo, Zicai Yang, T. Shirai, N. Hotta, W. J. Li, M. Sakata, Gui-Ming Le, X. L. Qian, K. Kawata, Ang Li, Haibing Hu, J. S. Liu, H. Lu, H. B. Hu, X. B. Qu, Masayoshi Kozai, S. Ozawa, Harufumi Tsuchiya, Danzengluobu, Y. Zhang, L. Xue, K. Yamauchi, A. Shiomi, Q. B. Gou, Y. Katayose, Zhaxisangzhu, T. Miyazaki, H. H. He, H. M. Zhang, I. Ohta, Ying Zhang, Chihiro Kato, S. W. Cui, X. Y. Zhang, H. Sugimoto, Minghui Liu, Takeshi Saito, Z. T. He, Masaki Nishizawa, W. Y. Chen, C. X. Liu, X. X. Zho, M. Amenomori, L. M. Zhai, X. J. Bi, Labaciren, T. L. Chen, Kazuoki Munakata, Y. Nakamura, T. Niwa, K. Kasahara, Z. Y. Feng, Jing Huang, Y. Q. Guo, Yi Zhang, C. F. Feng, J. Shao, H. Y. Jia, H. J. Li, Donghong Chen, H. R. Wu, X. R. Meng, L. L. Jiang, S. A. F. Yuan, Masato Takita, K. Hibino, Zhaoyang Feng, F. Kajino, T. Nakajima, M. Shibata, Y. Yamamoto, M. Ohnishi, S. Udo, N. Tateyama, Takashi Saito, Huaguang Wang, L. K. Ding, Jia Zhang, Y. H. Tan, and Shoji Torii

Subjects
Sun: coronal mass ejections (CMEs), Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, FOS: Physical sciences, Astrophysics, magnetic fields, 01 natural sciences, cosmic rays, Sun: activity, 0103 physical sciences, Shadow, Coronal mass ejection, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), integumentary system, Astronomy and Astrophysics, Solar maximum, Air shower, Space and Planetary Science, Magnitude (astronomy), Physics::Space Physics, Solar rotation, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Intensity (heat transfer)
Abstract

著者人数: The Tibet ASγ Collaboration 81名 (所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 小財, 正義), Number of authors: The Tibet ASγ Collaboration 81 (Affiliation. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS): Kozai, Masayoshi), Accepted: 2018-05-03, 資料番号: SA1180049000

Published
2018
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8. Cosmic ray physics with the ARGO-YBJ experiment

Author

B. Bartoli, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alì Staiti, Danzengluobu, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, B. Panico, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alì Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Astroparticle physics, Physics, Physics and Astronomy (miscellaneous), Proton, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Cosmic ray, Cosmic Rays, Array Detector, Astrophysics, Air shower, Observatory, Gamma-ray burst, Heliosphere
Abstract

The main scientific goals of the ARGO-YBJ ex- periment are -ray astronomy with a few hundreds GeV en- ergy threshold and cosmic ray physics below and around the knee of the primary energy spectrum (10 12 10 16 eV), where the transition from direct to indirect measurement techniques takes place. The ARGO-YBJ experiment, located at the Cos- mic Ray Observatory of Yangbajing (Tibet, P.R. of China, 4 300 m a.s.l.), is an unconventional Extensive Air Shower ar- ray of about 6,700 m 2 of active area, the only one exploiting the full-coverage technique at very high altitude currently in operation. The detector space-time granularity, performance and location offer a unique chance to make a detailed study of the structure of cosmic ray showers, in particular of the hadronic component. In this work we will focus on the main experimental results concerning cosmic ray and hadronic in- teraction physics: primary cosmic ray energy spectrum, an- tiproton over proton ratio, anisotropy in the cosmic ray flux and proton-air cross-section. Moreover, the possible data analysis improvements based on the use of all detailed infor- mation on the shower front (curvature, time width, rise time, ..), as well as the extension of the investigable energy range, allowed by the analog RPC readout, will be pointed out. nique at very high altitude presently in data taking. Location and detector features make ARGO-YBJ capable of investi- gating a wide range of fundamental issues in Cosmic Ray and Astroparticle Physics at relatively low energy threshold: - very high energy -ray astronomy, with an energy thresh- old of a few hundreds GeV; - search for emission of gamma ray bursts in the full GeV - TeV energy range; - study of cosmic rays (spectrum, composition, p/p ra- tio measurement, shower space-time structure, ...) starting at TeV energies; - Sun and heliosphere physics above Eth 1 GeV. In following sections, after a brief description of the detec- tor and its performance, the main results achieved on several items of cosmic ray physics will be presented and discussed.

Published
2011

9. Solar magnetic field strength and the 'Sun's Shadow'

Author

Masaki Nishizawa, C. F. Feng, L. L. Jiang, Zicai Yang, Danzengluobu, K. Mizutani, H. M. Zhang, X. X. Zhou, Chihiro Kato, W. J. Li, M. Amenomori, H. Sugimoto, T. Yuda, Zhaxisangzhu na, C. X. Liu, K. Hibino, Haibing Hu, X. L. Qian, Katsuaki Kasahara, J. Shao, Shunsuke Ozawa, H. Nanjo, L. Xue, Donghong Chen, Ying Zhang, Labaciren na, Y. Zhang, T. Shirai, S. W. Cui, Z. Y. Feng, I. Ohta, A. Shiomi, Yoshiaki Nakamura, T. Miyazaki, H. Y. Jia, Takeshi Saito, X. R. Meng, L. K. Ding, Zhaoyang Feng, Ang Li, Y. Q. Guo, Jian Huang, H. J. Li, Y. H. Tan, X. B. Qu, Takashi Saito, J. S. Liu, Huaguang Wang, H. R. Wu, Nigishi Hotta, L. M. Zhai, H. H. He, F. Kajino, W. Y. Chen, T. Nakajima, T. Niwa, Y. Yamamoto, M. Ohnishi, A. F. Yuan, Z. T. He, S. Udo, Kazuoki Munakata, T. L. Chen, X. J. Bi, Q. B. Gou, Masato Takita, T. Sasaki, Jia Zhang, S. Torii, M. Sakata, Gui-Ming Le, Hsiao-Chi Lu, M. Shibata, K. Kawata, H. B. Hu, Masayoshi Kozai, N. Tateyama, Harufumi Tsuchiya, Y. Nakamura, Y. Katayose, X. Y. Zhang, Minghui Liu, and K. Yamauchi

Subjects
Physics, Air shower, Angular displacement, Physics::Space Physics, Shadow, Astrophysics::Solar and Stellar Astrophysics, Field strength, Astrophysics::Earth and Planetary Astrophysics, Astrophysics, Interplanetary magnetic field, Intensity (heat transfer), Displacement (vector), Magnetic field
Abstract

The angular displacement of the center of the observed Sun's shadow from the center of the optical solar disc tells us the information of average solar magnetic field strength in the space between the Sun and the Earth. We analyze the displacement of the Sun's shadow observed in 5 ~ 240 TeV cosmic-ray intensity with the Tibet-III air shower array during 10 years between 2000 and 2009, and compare with the MC simulations based on the coronal magnetic field model and Parker's spiral interplanetary magnetic field model. We find that the observed North-South displacement is significantly larger than the prediction of simulations. This result uniquely suggests the underestimation of the average field strength between the Sun and the Earth in our model. In this work, we will report the actual solar magnetic field strength evaluated from the observed Sun's shadow.

Published
2017

10. The Tibet AS+MD Project; status report 2017

Author

Jia Zhang, S. Torii, L. K. Ding, Y. Yamamoto, Zicai Yang, Katsuaki Kasahara, K. Mizutani, K. Hibino, Haibing Hu, W. J. Li, T. K. Sako, N. Hotta, X. R. Meng, M. Amenomori, W. Y. Chen, Ang Li, A. F. Yuan, Zhaoyang Feng, X. J. Bi, Chihiro Kato, T. Miyazaki, Y. Zhang, X. B. Qu, Yi Zhang, Danzengluobu, K. Yamauchi, Q. B. Gou, Masato Takita, A. Shiomi, C. X. Liu, Hsiao-Chi Lu, M. Sakata, Takashi Saito, Ying Zhang, S. W. Cui, H. M. Zhang, J. S. Liu, Takeshi Saito, X. X. Zhou, Zhaxisangzhu na, Gui-Ming Le, Huaguang Wang, H. Y. Jia, H. H. He, H. Sugimoto, J. Shao, L. M. Zhai, Z. Y. Feng, Minghui Liu, H. Nanjo, T. Shirai, M. Shibata, T. Niwa, Jian Huang, T. Yuda, M. Ohnishi, H. B. Hu, Masayoshi Kozai, S. Udo, F. Kajino, T. Ohta, T. Nakajima, Y. H. Tan, Y. Q. Guo, N. Tateyama, Donghong Chen, Harufumi Tsuchiya, H. J. Li, H. R. Wu, Shunsuke Ozawa, Z. T. He, K. Kawata, X. L. Qian, Kazuoki Munakata, L. Xue, Masaki Nishizawa, Y. Nakamura, C. F. Feng, L. L. Jiang, and Y. Katayose

Subjects
Physics, Muon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Counting Number, Status report, Galaxy, Nuclear physics, Air shower, High Energy Physics::Experiment, Event (particle physics), Muon detector
Abstract

We built a large (approximately 4,000 m**2) water Cherenkov- type muon detector array under the existing Tibet air shower array at 4,300 m above sea level, to observe 10-1000 TeV gamma rays from cosmic-ray accelerators in our Galaxy with wide field of view at very low background level. A gamma-ray induced air shower has significantly less muons compared with a cosmic-ray induced one. Therefore, we can effectively discriminate between primary gamma rays and cosmic-ray background events by means of counting number of muons in an air shower event by the muon detector array. We make a status report on the experiment.

Published
2017

11. Interplanetary Coronal Mass Ejection and the Sun's Shadow Observed by the Tibet Air Shower Array

Author

H. Nanjo, M. Ohnishi, T. Shirai, S. Udo, Takeshi Saito, Ying Zhang, Kazumasa Kawata, S. W. Cui, L. M. Zhai, Donghong Chen, Jian Huang, F. Kajino, T. Nakajima, Yi Zhang, M. Shibata, H. B. Hu, C. F. Feng, Masayoshi Kozai, K. Kawata, Z. T. He, T. L. Chen, X. L. Qian, Ang Li, L. L. Jiang, Z. Y. Feng, X. J. Bi, K. Hibino, T. Yuda, Haibing Hu, X. B. Qu, Katsuaki Kasahara, Takashi Saito, Chihiro Kato, Y. Zhang, Huaguang Wang, A. Shiomi, Danzengluobu, C. X. Liu, K. Yamauchi, H. M. Zhang, L. Xue, X. X. Zhou, T. Niwa, H. Sugimoto, W. Y. Chen, M. Sakata, X. R. Meng, Zhaoyang Feng, Labaciren na, Yu Yamamoto, Gui-Ming Le, Zhaxisangzhu na, H. Y. Jia, Masaki Nishizawa, T. K. Sako, J. S. Liu, N. Tateyama, Harufumi Tsuchiya, I. Ohta, M. Amenomori, J. Shao, Y. Q. Guo, Y. Katayose, X. Y. Zhang, Minghui Liu, H. J. Li, H. R. Wu, Hsiao-Chi Lu, Nigishi Hotta, Zicai Yang, W. J. Li, K. Mizutani, Y. Nakamura, Q. B. Gou, Masato Takita, A. F. Yuan, Kazuoki Munakata, Jia Zhang, S. Torii, L. K. Ding, Shunsuke Ozawa, T. Miyazaki, Y. H. Tan, and H. H. He

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics, Solar maximum, Magnetic field, Interplanetary coronal mass ejection, Air shower, Physics::Space Physics, Shadow, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Transit (astronomy), Variation (astronomy), Intensity (heat transfer)
Abstract

We continuously observed the Sun’s shadow in 3 TeV cosmic-ray intensity with the Tibet-III air shower array since 2000. We find a clear solar-cycle variation of the deficit intensity in the Sun’s shadow during the periods between 2000 and 2009. The MC simulation of the Sun’s shadow based on the coronal magnetic field model does not well reproduce the observed deficit intensity around the solar maximum. However, when we exclude the transit periods during ICMEs towards to the Earth, the MC simulation shows better reproducibility. In the present paper, we report on the MC simulation and the analysis method of the Sun’s shadow observed by the Tibet-III array.

Published
2017

12. Measurement of high energy cosmic rays by the new Tibet hybrid experiment

Author

Labaciren na, Jian Huang, H. Y. Jia, Y. Katayose, M. Amenomori, H. B. Hu, Chihiro Kato, Masayoshi Kozai, Y. Q. Guo, C. X. Liu, H. J. Li, H. R. Wu, H. M. Zhang, X. X. Zhou, Masaki Nishizawa, X. L. Qian, H. Sugimoto, S. Ozawa, K. Mizutani, H. Nanjo, Huaguang Wang, Ying Zhang, Nigishi Hotta, T. Shirai, T. Yuda, Q. B. Gou, Masato Takita, M. Shibata, K. Hibino, M. Sakata, Zicai Yang, S. W. Cui, L. Xue, Haibing Hu, W. J. Li, I. Ohta, Gui-Ming Le, Y. Yamamoto, X. J. Bi, F. Kajino, Y. Zhang, T. Nakajima, C. F. Feng, Donghong Chen, A. Shiomi, K. Kasahara, Jing Huang, Ang Li, X. B. Qu, M. Ohnishi, T. K. Sako, L. L. Jiang, J. S. Liu, Danzengluobu Na, J. Shao, Yi Zhang, K. Kawata, T. Niwa, Y. Nakamura, Z. Y. Feng, Takeshi Saito, Shigeharu Udo, Jia Zhang, X. R. Meng, S. Torii, Z. T. He, A. F. Yuan, W. Y. Chen, Kazuoki Munakata, Zhaoyang Feng, L. M. Zhai, T. L. Chen, Zhaxisangzhu na, K. Yamauchi, N. Tateyama, L. K. Ding, Harufumi Tsuchiya, X. Y. Zhang, Minghui Liu, Hsiao-Chi Lu, Y. H. Tan, T. Miyazaki, and H. H. He

Subjects
Core (optical fiber), Nuclear physics, Physics, High energy, Air shower, Energy spectrum, Detector, Ultra-high-energy cosmic ray
Abstract

We have started a new hybrid air shower experiment at Yangbajing (4300 m a.s.l.) in Tibet in February 2014. This new hybrid experiment consists of the YAC-II comprised of 124 core detectors placed in the form of a square grid of 1.9 m spacing covering about 500 m2, the Tibet-III air shower array with the total area of about 50,000 m2 and the underground MD array consisting of 80 cells, with the total area of about 4,200 m2. This hybrid-array system is used to observe air showers of high energy celestial gamma-ray origin and those of nuclear-component origin. In this paper, a short review of the experiment will be followed by an overview on the current results on energy spectrum and chemical composition of CRs and test of hadronic interaction models.

Published
2017

13. The ARGO-YBJ experiment in Tibet

Author

THE ARGO YBJ COLLABORATION G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, D'ALI' STAITI G, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, THE ARGO YBJ COLLABORATION G., Aielli a, B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g

Subjects
Physics, Nuclear and High Energy Physics, Gamma ray burst, Single cluster, Trigger rate, Detector, gamma ray bursts, gamma rays, cosmic rays, extended air showers, Astronomy, Sampling (statistics), Cosmic ray, Extended air showers, Cosmic rays, Gamma ray sources, Gamma ray bursts, Gamma ray sources, Geodesy, Guard ring, Extended air shower, Sampling density, Instrumentation, Argo
Abstract

The setting up of the ARGO detector at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China) has been completed during the last spring (2007). It consists of a central carpet made of 130 identical sub-units of 12 RPCs each (a "cluster"), covering a surface of about 5800 m2 with 93% active area, and a guard ring of 24 further clusters of the same type surrounding the central carpet with a lower sampling density. Signals are picked up by external electrodes of small size, thus allowing the sampling of EAS with high space-time granularity. Shower events are detected at a trigger rate of about 4 kHz. Events with a few particles detected by a single cluster are counted in scaler mode on a time base of 500 ms. The intrinsic modularity of the ARGO detector allowed us to collect data even during the setting-up period, using only the central carpet (or even part of it). Some preliminary results from the analysis of events collected in a few months of data taking are presented. © 2008 Elsevier B.V. All rights reserved.

Published
2008

14. The Yangbajing Super Complex Array Plan Based on the ARGO Carpet

Author

THE ARGO YBJ COLLABORATION G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, THE ARGO YBJ COLLABORATION G., Aielli a, B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, C. F., Feng, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, J. Y., Li, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, Mari, Stefano Maria, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, X. B., Qu, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, L., Xue, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, X. Y., Zhang, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g

Subjects
Physics, Nuclear and High Energy Physics, Proton, business.industry, Detector, Gamma ray, Phase (waves), Scintillator, Interference (wave propagation), Atomic and Molecular Physics, and Optics, Optics, business, Event (particle physics), Argo
Abstract

Following the completion of the 5700m 2 RPC carpet-like AS array at YangBaJing this year, a further plan based on the ARGO Carpet is raised. It characterizes with its high altitude site, its full-coverage detector array and the multi-parameter measurements. Apart from studies on TeV and sub-TeV energy range, UHE Gamma-ray sources and the Knee Physics will become its characteristic subjects. In the first phase of the plan, the Yangbajing Super Complex Array (YSCA) will include a 10 4 m 2 RPC Carpet, five indoor μ -detectors (∼170 m 2 each), four big outdoor μ -detectors (∼432 m 2 each) and a traditional field scintillation detector array surrounding the Carpet. Monte-Carlo study shows that, with such an array in YBJ (4300m a.s.l.), γ -ray induced air showers can be separated from proton induced air showers clearly using only the observed electron and μ data event by event. To assist the classification of UHE air showers induced by different primary nuclei groups without severe interference by Composition/Model Entanglement, a second phase plan having a Central Burst Detector Array (CBDA) and some pulse shape detectors is schemed.

Published
2008

15. Preliminary results of the Moon shadow using ARGO-YBJ detector

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Physics, Nuclear and High Energy Physics, Detector, Moon shadow, Astronomy, Cosmic ray, Full coverage, Resistive Plate Chamber, Atomic and Molecular Physics, and Optics, Argo-Ybj, Air shower, Extended air shower, Shadow, Angular resolution, Argo
Abstract

ARGO-YBJ is a “full coverage” air shower detector consisting of Resistive Plate Chambers(RPCs) at the Yangbajing High Altitude Cosmic Ray Laboratory (Tibet, China) at 4300 m a.s.l. (lat=30.11° N, long=90.53° E). Using the data collected with a carpet of RPCs (1900 m 2 , about 1/3 of the whole ARGO-YBJ detector), the cosmic ray shadowing effect due to the Moon was studied. The 50% angular resolution is found to be ∼1.2° with the Chess-board method and the Moon shadow with a significance of 4.9 σ is found displaced by 0.7° westward and 0.5° northward with respect to the expected position by the equi-zenith angle Method.

Published
2008

16. The cosmic ray energy spectrum measured with the new Tibet hybrid experiment

Author

N. Hotta, Hui Hu, Jia Zhang, Masaki Nishizawa, K. Kawata, C. F. Feng, M. Ohnishi, X. B. Qu, W. Y. Chen, L. L. Jiang, Y. Katayose, S. Udo, L. Xue, N. Tateyama, Kazuoki Munakata, Yuya Nakamura, Danzengluobu, Jian Liu, Ang Li, Harufumi Tsuchiya, S. Ozawa, Haibing Hu, H. H. He, K. Yamauchi, Hong-peng Lu, A. F. Yuan, Chihiro Kato, Y. Zhang, Shoji Torii, A. Shiomi, Zhaxisangzhu, Zhenyong Feng, C. X. Liu, X. Y. Zhang, Y. H. Lin, Minghui Liu, H. M. Zhang, X. X. Zhou, Masayoshi Kozai, M. Amenomori, Takashi Sako, H. Sugimoto, Labaciren, To. Saito, M. Shibata, Y. Q. Guo, Takashi Saito, F. Kajino, T. Nakajima, Huaguang Wang, M. Sakata, Y. Yamamoto, Gui-Ming Le, X. R. Meng, Y. H. Tan, Zhaoyang Feng, T. Niwa, H. J. Li, Q. B. Gou, X. L. Qian, Masato Takita, H. R. Wu, H. Nanjo, X. J. Bi, J. Shao, K. Hibino, T. Miyazaki, T. Shirai, Z. T. He, H. Y. Jia, T. L. Chen, Zicai Yang, W. J. Li, K. Kasahara, Jing Huang, Donghong Chen, I. Ohta, L. M. Zhai, Liming Ding, Ying Zhang, S. W. Cui, and Yi Zhang

Subjects
Physics, Range (particle radiation), Proton, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, chemistry.chemical_element, Cosmic ray, Interaction model, 01 natural sciences, Spectral line, Nuclear physics, chemistry, 0103 physical sciences, High Energy Physics::Experiment, 010303 astronomy & astrophysics, Helium
Abstract

We have upgraded the new Tibet ASgamma experiment in China since 2014 to measure the chemical composition of cosmic rays around the knee. This hybrid experiment consist of an air-shower-core detector array (YAC-II) to detect high energy electromagnetic component, the Tibet air-shower array (Tibet-III) and a large underground water-Cherenkov muon-detector array (MD). We have carried out a detailed air-shower Monte Carlo (MC) simulation to study the performance of the hybrid detectors by using CORSIKA (version 7.5000), which includes EPOS-LHC, QGSJETII-04, SIBYLL2.1 and SIBYLL2.3 hadronic interaction models. The preliminary results of the interaction model checking above 50 TeV energy region are reported in this paper, and the primary proton and helium spectra in the energy range 50 TeV to 1015 eV was derived from YAC-I data and is smoothly connected with direct observation data at lower energies and also with our previously reported works at higher energies within statistical errors. The knee of the (P+He) spectra is located around 400 TeV. The interaction model dependence in deriving the primary (P+He) spectra is found to be small (less than 25% in absolute intensity, 10% in position of the knee), and the composition model dependence is less than 10% in absolute intensity.

Published
2019

17. On the Solar Cycle Variation of the Solar Diurnal Anisotropy of Multi-TeV Cosmic-ray Intensity Observed with the Tibet Air Shower Array

Author

Jian Liu, Zhenyong Feng, M. Amenomori, Z. T. He, Yi Zhang, F. Kajino, T. Nakajima, T. L. Chen, M. Ohnishi, H. H. He, M. Shibata, Ang Li, Haibing Hu, W. Y. Chen, Chihiro Kato, Takashi Sako, S. Udo, C. X. Liu, X. J. Bi, Liming Ding, L. Xue, S. Ozawa, H. Nanjo, Y. Zhang, T. Miyazaki, A. F. Yuan, T. Shirai, Ying Zhang, Hui Hu, Hong-peng Lu, K. Yamauchi, A. Shiomi, Jia Zhang, Donghong Chen, S. W. Cui, H. M. Zhang, X. X. Zhou, Labaciren, X. R. Meng, I. Ohta, H. Sugimoto, Zhaxisangzhu, K. Kawata, Y. H. Lin, X. Y. Zhang, Minghui Liu, L. M. Zhai, K. Hibino, Zhaoyang Feng, Y. Katayose, Takashi Saito, X. L. Qian, X. B. Qu, Huaguang Wang, Shoji Torii, Y. Yamamoto, Y. Q. Guo, H. Y. Jia, H. J. Li, H. R. Wu, K. Kasahara, Jing Huang, To. Saito, Y. H. Tan, Masaki Nishizawa, C. F. Feng, L. L. Jiang, M. Sakata, Gui-Ming Le, Zicai Yang, W. J. Li, Yuya Nakamura, Danzengluobu, T. Niwa, J. Shao, Masayoshi Kozai, Kazuoki Munakata, N. Tateyama, Harufumi Tsuchiya, N. Hotta, Q. B. Gou, and Masato Takita

Subjects
Physics, 010504 meteorology & atmospheric sciences, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Phase (waves), Cosmic ray, Astrophysics, 01 natural sciences, Solar cycle, Intensity (physics), Air shower, Amplitude, Solar time, 0103 physical sciences, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Anisotropy, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences
Abstract

We analyze the temporal variation of the solar diurnal anisotropy of the multi-TeV cosmic-ray intensity observed with the Tibet air shower array from 2000 to 2009, covering the maximum and minimum of the 23rd solar cycle. We comfirm that a remarkable additional anisotropy component is superposed on the Compton-Getting anisotropy at 4.0 TeV, while its amplitude decreases at higher energy regions. In constrast to the additional anisotropy reported by the Matsushiro experiment at 0.6 TeV, we find the residual component measured by Tibet at multi-TeV energies is consistent with being stable, with a fairly constant amplitude of 0.041% ± 0.003% and a phase at around 07.17 ± 00.16 local solar time at 4.0 TeV. This suggests the additional anisotropy observed by the Tibet experiment could result from mechanisms unrelated to solar activities.

Published
2019

18. Test of the hadronic interaction models SIBYLL2.3, EPOS-LHC and QGSJETII- 04 with Tibet EAS core data

Author

T. Miyazaki, Labaciren, Z. T. He, Haibing Hu, M. Amenomori, T. L. Chen, Y. Q. Guo, Y. Zhang, H. J. Li, A. Shiomi, Kazuoki Munakata, Masaki Nishizawa, H. R. Wu, H. B. Hu, Y. H. Tan, Masayoshi Kozai, N. Hotta, Zicai Yang, W. J. Li, H. M. Zhang, X. X. Zhou, H. H. He, Hsiao-Chi Lu, T. K. Sako, H. Sugimoto, X. L. Qian, I. Ohta, X. J. Bi, A. F. Yuan, M. Shibata, J. S. Liu, C. F. Feng, N. Tateyama, H. Y. Jia, Jia Zhang, J. Shao, L. Xue, Harufumi Tsuchiya, Donghong Chen, L. L. Jiang, S. Torii, Y. Nakamura, X. Y. Zhang, Minghui Liu, H. Nanjo, X. R. Meng, K. Kawata, Chihiro Kato, Zhaoyang Feng, K. Hibino, T. Shirai, W. Y. Chen, K. Kasahara, Y. H. Lin, Danzengluobu, Y. Katayose, M. Sakata, Jing Huang, Gui-Ming Le, K. Yamauchi, C. X. Liu, Q. B. Gou, Masato Takita, T. Niwa, Takashi Saito, Huaguang Wang, L. K. Ding, Z. Y. Feng, Y. Yamamoto, S. Ozawa, Ang Li, X. B. Qu, F. Kajino, T. Nakajima, Zhaxisangzhu, M. Ohnishi, S. Udo, Ying Zhang, S. W. Cui, Yi Zhang, Takeshi Saito, and L. M. Zhai

Subjects
Physics, Core (optical fiber), Nuclear physics, Large Hadron Collider, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Hadron, High Energy Physics::Experiment
Abstract

A hybrid experiment has been started by the ASγ experiment at Yangbajing (4300m a.s.l.) in Tibet since May 2009, that consists of a high-energy air-shower-core array (YAC-I) and a high-density air-shower array (Tibet-III). In this paper, we report our results to check the hadronic interaction models SIBYLL2.3, SIBYLL2.1, EPOS-LHC and QGSJETII-04 in the multi-tens TeV energy region using YAC-I+Tibet-III experimental data from May 2009 through January 2010. The effective live time is calculated as 106.05 days. The results show that the description of transverse momentum, inelastic cross-section and inelasticity for the 4 hadronic interaction models is consistent with YAC-I experimental data within 15% systematic errors range in the forward region below 100 TeV. Among them, the EPOS-LHC model is the best hadronic interaction model. Furthermore, we find that the H4a composition model is the best one below the 100 TeV energy region.

Published
2019

19. Long term stability analysis on the MD-A under TIBET III array

Author

Chihiro Kato, H. M. Zhang, X. X. Zhou, X. J. Bi, Y. H. Tan, W. J. Li, C. X. Liu, Ying Zhang, S. W. Cui, H. Y. Jia, H. Sugimoto, M. Ohnishi, K. Mizutani, T. Miyazaki, M. Amenomori, Jia Zhang, Danzengluobu, S. Udo, S. Yasue, Z. T. He, Q. B. Gou, Masato Takita, K. Yamauchi, F. Kajino, T. Nakajima, Y. Nakamura, T. L. Chen, J. S. Liu, X. L. Qian, N. Hotta, K. Kawata, X. B. Qu, Takashi Saito, X. Y. Zhang, Y. Katayose, Huaguang Wang, Minghui Liu, Haibing Hu, Z. Y. Feng, L. Xue, K. Kasahara, A. F. Li, J. Shao, H. H. He, Zicai Yang, K. Hibino, M. Shibata, Donghong Chen, Takashi Sako, Hsiao-Chi Lu, T. Yuda, Zhaxisangzhu, Y. Zhang, W. Y. Chen, L. K. Ding, Y. Q. Guo, I. Ohta, Shunsuke Ozawa, H. J. Li, H. R. Wu, X. R. Meng, A. Shiomi, Zhaoyang Feng, T. Niwa, Y. Yamamoto, Jian Huang, Shoji Torii, Kazuoki Munakata, Takeshi Saito, L. M. Zhai, Yi Zhang, H. Nanjo, C. F. Feng, T. Shirai, L. L. Jiang, Masaki Nishizawa, M. Sakata, Gui-Ming Le, N. Tateyama, Harufumi Tsuchiya, A. F. Yuan, H. B. Hu, Masayoshi Kozai, and Labaciren

Subjects
Thesaurus (information retrieval), Information retrieval, Computer science, Stability (learning theory), Term (time)
Published
2016

20. Observation of primary cosmic rays with the new Tibet hybrid experiment(YAC-II + Tibet-III + MD))

Author

Takeshi Saito, T. Yuda, Kazuoki Munakata, Z. Y. Feng, K. Yamauchi, L. K. Ding, Zhaxisangzhu, N. Hotta, L. M. Zhai, W. Y. Chen, Hsiao-Chi Lu, Y. Q. Guo, Jia Zhang, Donghong Chen, S. Yasue, H. J. Li, Haibing Hu, H. R. Wu, Q. B. Gou, Masato Takita, Y. Zhang, H. Y. Jia, K. Hibino, I. Ohta, A. Shiomi, X. Y. Zhang, M. Ohnishi, Minghui Liu, H. M. Zhang, X. X. Zhou, S. Udo, M. Amenomori, Z. T. He, H. Sugimoto, H. B. Hu, Chihiro Kato, T. Niwa, Masayoshi Kozai, Y. Yamamoto, Yi Zhang, T. L. Chen, K. Mizutani, C. X. Liu, A. F. Yuan, K. Kawata, X. L. Qian, Takashi Saito, Danzengluobu, Huaguang Wang, W. J. Li, J. S. Liu, Ying Zhang, S. W. Cui, Zicai Yang, H. Nanjo, N. Tateyama, M. Shibata, T. Shirai, Y. Nakamura, Harufumi Tsuchiya, Labaciren, L. Xue, F. Kajino, T. Nakajima, M. Sakata, Y. Katayose, Gui-Ming Le, X. B. Qu, Masaki Nishizawa, C. F. Feng, Y. H. Tan, J. Shao, H. H. He, L. L. Jiang, T. Miyazaki, Takashi Sako, Shoji Torii, X. R. Meng, Zhaoyang Feng, K. Kasahara, Shunsuke Ozawa, A. F. Li, Jing Huang, and X. J. Bi

Subjects
Physics, Primary (astronomy), Astronomy, Cosmic ray
Published
2016

21. Sidereal anisotropy of Galactic cosmic ray observed by the Tibet Air Shower experiment and the IceCube experiment

Author

T. Miyazaki, F. Kajino, T. Nakajima, Yi Zhang, C. F. Feng, K. Kawata, Jian Huang, X. L. Qian, L. L. Jiang, Zicai Yang, K. Mizutani, Chihiro Kato, Haibing Hu, M. Shibata, Y. Zhang, M. Ohnishi, A. Shiomi, C. X. Liu, W. J. Li, Shunsuke Ozawa, H. M. Zhang, Ying Zhang, X. X. Zhou, H. Sugimoto, S. Udo, L. Xue, N. Hotta, S. W. Cui, Shoji Torii, Takeshi Saito, A. F. Yuan, Y. H. Tan, N. Tateyama, Hsiao-Chi Lu, Z. Y. Feng, S. Yasue, Y. Q. Guo, J. Shao, H. H. He, L. M. Zhai, Harufumi Tsuchiya, Danzengluobu, Q. B. Gou, L. K. Ding, T. Yuda, H. J. Li, Masato Takita, H. R. Wu, K. Hibino, X. Y. Zhang, Minghui Liu, T. Niwa, Labaciren, M. Amenomori, J. S. Liu, Zhaxisangzhu, Takashi Saito, X. B. Qu, Jia Zhang, Huaguang Wang, K. Yamauchi, H. B. Hu, H. Y. Jia, Masayoshi Kozai, Kazuoki Munakata, Y. Yamamoto, Masaki Nishizawa, M. Sakata, Gui-Ming Le, H. Nanjo, T. Shirai, Donghong Chen, I. Ohta, Z. T. He, T. L. Chen, K. Kasahara, A. F. Li, X. J. Bi, W. Y. Chen, Takashi Sako, X. R. Meng, Zhaoyang Feng, Y. Nakamura, and Y. Katayose

Subjects
Physics, Air shower, Sidereal time, Astronomy, Cosmic ray, Astrophysics, Anisotropy
Published
2016

22. Is the large-scale sidereal anisotropy of the galactic cosmic-ray intensity really instable at TeV energies?

Author

H. Nanjo, T. Shirai, Danzengluobu, Zhenyong Feng, C. F. Feng, Haibing Hu, M. Amenomori, K. Kasahara, L. L. Jiang, Y. Zhang, M. Sakata, A. F. Li, A. Shiomi, Gui-Ming Le, Jing Huang, Chihiro Kato, H. M. Zhang, X. X. Zhou, Y. Q. Guo, H. Sugimoto, X. B. Qu, X. L. Qian, J. S. Liu, A. F. Yuan, H. R. Wu, J. Shao, I. Ohta, C. X. Liu, Huihai He, X. R. Meng, Zhaoyang Feng, N. Tateyama, W. Y. Chen, L. Xue, Harufumi Tsuchiya, K. Mizutani, D. Chen, Z. T. He, Masaki Nishizawa, X. Y. Zhang, Shunsuke Ozawa, Kazuoki Munakata, T. K. Sako, Labaciren, N. Hotta, Y. Katayose, Y. Yamamoto, Shoji Torii, Zhaxisangzhu, X. J. Bi, K. Hibino, X. H. Ding, H. B. Hu, H. W. Guo, Hsiao-Chi Lu, Y. H. Tan, M. Shibata, F. Kajino, Zicai Yang, S. Yasue, Q. B. Gou, Masato Takita, L. K. Ding, Jia Zhang, Yi Zhang, M. Ohnishi, S. Udo, Takashi Saito, W. J. Li, Ying Zhang, Huaguang Wang, S. W. Cui, Takeshi Saito, Kazumasa Kawata, L. M. Zhai, T. Yuda, and H. Y. Jia

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Amplitude, Observatory, Sidereal time, Physics::Space Physics, Milagro, High Energy Physics::Experiment, Right ascension, Anisotropy, Heliosphere
Abstract

The sidereal cosmic-ray anisotropy at TeV energies has a large-scale deficit region distributed between 150 and 240 degrees in right ascension, which is called the “loss-cone”. The Milagro experiment reported the detection of a steady increase in the loss-cone amplitude at 6 TeV from July 2000 to July 2007. In this paper, we examine Milagro’s claim using the data collected by the Tibet air-shower experiment from November 1999 through December 2008. No time dependence was found in the loss-cone amplitude at 4.4, 6.2, and 11 TeV. If the increase in the loss-cone amplitude were, as Milagro argued, due to variations in the heliosphere in relation to solar activities, the same tendency would be seen at sub-TeV energies where the anisotropy is far more sensitive to solar activities. At 0.6 TeV, however, Matsushiro underground muon observatory reported no significant increase in the loss-cone amplitude during the corresponding period.

Published
2012

23. Performance of the resistive plate chambers in the ARGO-YBJ experiment

Author

The Argo YBJ Collaboration: G. Aielli a, b, C. Bacci c, d, F. Barone e, f, B. Bartoli g, P. Bernardini h, i, X. J. Bi j, C. Bleve h, i, 1, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne h, P. Camarri a, Z. Cao j, A. Cappa k, l, R. Cardarelli b, S. Catalanotti g, C. Cattaneo m, S. Cavaliere g, P. Celio c, S. Z. Chen j, N. Cheng j, P. Creti i, S. W. Cui n, G. Cusumano o, p, B. Z. Dai q, G. D’Alí Staiti p, r, Danzengluobu s, M. Dattoli k, l, t, I. De Mitri h, R. De Rosa g, B. D’Ettorre Piazzoli g, M. De Vincenzi c, T. Di Girolamo g, X. H. Ding s, G. Di Sciascio f, C. F. Feng u, Zhaoyang Feng j, ZhenyongFeng v, C. Ferrigno o, F. Galeazzi d, P. Galeotti k, t, X. Y. Gao q. R. Gargana d, F. Garufig, Q. B. Gou j, H. H. He j, Haibing Hu s, Hongbo Hu j, Q. Huang v, M. Iacovacci g, I. James m, w, H. Y. Jia v, Labaciren s, H. J. Li s, J. Y. Li u, B. Liberti b, G. Liguori m, C. Q. Liuq, J. Liu q, H. Lu j, G. Mancarella h, MARI, Stefano Maria, c, d, G. Marsella i, x, D. Martello h, S. Mastroianni c, X. R. Meng s, J. Mu q, L. Nicastro p, y, C. C. Ning s, L. Palummo a, M. Panareo i, L. Perrone i, P. Pistilli c, X. B. Qu u, E. Rossi f, F. Ruggieri d, L. Saggese g, P. Salvini m, R. Santonico a, A. Segreto o, P. R. Shen j, X. D. Sheng j, F. Shi j, C. Stanescu d, A. Surdo i, Y. H. Tan j, P. Vallania k, S. Vernetto k, C. Vigorito k, H. Wang j, Y. G. Wang j, C. Y. Wu j, H. R. Wu j, B. Xu v, L. Xue u, H. T. Yang q, Q. Y. Yang q, X. C. Yang q, G. C. Yu v, A. F. Yuan s, M. Zha j, H. M. Zhang j, J. L. Zhang j, L. Zhang q, P. Zhang q, X. Y. Zhang u, Y. Zhang j, Zhaxisangzhu s, X. X. Zhou v, F. R. Zhu j, Q. Q. Zhu j, G. Zizzi h, The Argo YBJ Collaboration: G., Aielli a, B, C., Bacci c, D, F., Barone e, F, B., Bartoli g, P., Bernardini h, I, X. J., Bi j, C., Bleve h, I, 1, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne h, P., Camarri a, Z., Cao j, A., Cappa k, L, R., Cardarelli b, S., Catalanotti g, C., Cattaneo m, S., Cavaliere g, P., Celio c, S. Z., Chen j, N., Cheng j, P., Creti i, S. W., Cui n, G., Cusumano o, P, B. Z., Dai q, G., D’Alí Staiti p, R, Danzengluobu, S, M., Dattoli k, L, T, I., De Mitri h, R., De Rosa g, B., D’Ettorre Piazzoli g, M., De Vincenzi c, T., Di Girolamo g, X. H., Ding, G., Di Sciascio f, C. F., Feng u, Zhaoyang Feng, J, Zhenyongfeng, V, C., Ferrigno o, F., Galeazzi d, P., Galeotti k, T, X. Y. Gao q. R., Gargana d, F., Garufig, Q. B., Gou j, H. H., He j, Haibing Hu, S, Hongbo Hu, J, Q., Huang v, M., Iacovacci g, I., James m, W, H. Y., Jia v, Labaciren, S, H. J., Li, J. Y., Li u, B., Liberti b, G., Liguori m, C. Q., Liuq, J., Liu q, H., Lu j, G., Mancarella h, Mari, Stefano Maria, C, D, G., Marsella i, X, D., Martello h, S., Mastroianni c, X. R., Meng, J., Mu q, L., Nicastro p, Y, C. C., Ning, L., Palummo a, M., Panareo i, L., Perrone i, P., Pistilli c, X. B., Qu u, E., Rossi f, F., Ruggieri d, L., Saggese g, P., Salvini m, R., Santonico a, A., Segreto o, P. R., Shen j, X. D., Sheng j, F., Shi j, C., Stanescu d, A., Surdo i, Y. H., Tan j, P., Vallania k, S., Vernetto k, C., Vigorito k, H., Wang j, Y. G., Wang j, C. Y., Wu j, H. R., Wu j, B., Xu v, L., Xue u, H. T., Yang q, Q. Y., Yang q, X. C., Yang q, G. C., Yu v, A. F., Yuan, M., Zha j, H. M., Zhang j, J. L., Zhang j, L., Zhang q, P., Zhang q, X. Y., Zhang u, Y., Zhang j, Zhaxisangzhu, S, X. X., Zhou v, F. R., Zhu j, Q. Q., Zhu j, G., Zizzi h, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, J., Mu, L., Nicastro, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Resistive touchscreen, Gamma-ray astronomy, Physics::Instrumentation and Detectors, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, Settore FIS/01 - Fisica Sperimentale, Extensive Air Shower, Extensive Air Showers, Resistive Plate Chambers, Resistive Plate Chambers, Extensive Air Showers, Gamma-ray astronomy, Nuclear physics, Optics, Sampling (signal processing), High Energy Physics::Experiment, Current (fluid), business, Instrumentation, Energy (signal processing), Order of magnitude, Argo
Abstract

The ARGO-YBJ experiment is designed for the detection of Extensive Air Showers (EAS) in the primary energy range 100 GeV–10 TeV. Its full-coverage feature allows to lower the energy threshold about one order of magnitude with respect to sampling EAS detectors. Here the performance of the RPC array is described and the current status of the experiment is presented.

Published
2007

24. Measurement of the cosmic ray antiproton/proton flux ratio at TeV energies with the ARGO-YBJ detector

Author

X. X. Li, I. De Mitri, M. Iacovacci, M. Zha, G. D'Alí Staiti, Zhenyong Feng, P. Vallania, S. Vernetto, C. Cattaneo, F. R. Zhu, C. Liu, T. L. Chen, X. H. Ma, H.H. He, S. W. Cui, Jilong Zhang, F. Ruggieri, Q. Q. Zhu, P. Bernardini, S. Catalanotti, M. Panareo, Giovanni Mancarella, T. Di Girolamo, B. D'Ettorre Piazzoli, Y. Q. Guo, Carla Bleve, C. Y. Wu, E. Giroletti, B. Panico, P. Salvini, Zhaxiciren, R. Santonico, Zihuang Cao, Y. B. Chen, H. J. Li, Paolo Camarri, C. Q. Liu, H. R. Wu, Hongbo Hu, L. Xue, C. F. Feng, A. K. Calabrese Melcarne, A. F. Yuan, Carlo Vigorito, B. Z. Dai, Paolo Montini, R. Iuppa, B. Bartoli, Hong-peng Lu, X. Y. Zhang, X. C. Yang, G. Marsella, Haibing Hu, Cristian Stanescu, P. Branchini, Y. X. Yan, Antonio Budano, B. S. Wang, J. K. K. Liu, Zhaxisangzhu, Labaciren, Irina James, Y. Zhang, Chang-Chun Ning, Zhaoyang Feng, D. Martello, Longzhou Zhang, L. Perrone, Jianli Zhang, P. Creti, P. Pistilli, H. M. Zhang, X. X. Zhou, Z. G. Yao, Bingwei Xu, A. Surdo, Q. Huang, Huaguang Wang, G. Liguori, Fudong Shi, S. Mastroianni, Q. B. Gou, X. D. Sheng, P. R. Shen, P. F. Zhang, X. J. Bi, S. Z. Chen, S. M. Mari, X. B. Qu, X. H. Ding, Roberto Cardarelli, G. Di Sciascio, Y. H. Tan, J. Y. Li, M. Y. Liu, Q. Y. Yang, H. Y. Jia, Danzengluobu, G. Zizzi, I. Bolognino, A. Pagliaro, Bartoli, B., Bernardini, P., Bi, X. J., Bleve, C., Bolognino, I., Branchini, P., Budano, A., Melcarne A. K., Calabrese, Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, S., Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., Staiti G., D'Ali, Danzengluobu, De Mitri, I., Piazzoli B., D'Ettorre, Di Girolamo, T., Ding, X. H., Di Sciascio, G., Feng, C. F., Feng, Zhaoyang, Feng, Zhenyong, Giroletti, E., Gou, Q. B., Guo, Y. Q., He, H. H., Hu, Haibing, Hu, Hongbo, Huang, Q., Iacovacci, M., Iuppa, R., James, I., Jia, H. Y., Labaciren, Li, H. J., Li, J. Y., Li, X. X., Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., Ma, X. H., Mancarella, G., Mari, Stefano Maria, Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Qu, X. B., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Wu, C. Y., Wu, H. R., Xu, B., Xue, L., Yan, Y. X., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhaxiciren, Zhaxisangzhu, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., Bartoli, Bruno, Bi, X., Calabrese Melcarne, A., Catalanotti, Sergio, Chen, S., Chen, T., Cui, S., Dai, B., D’Alí Staiti, G., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Ding, X., Feng, C., Zhaoyang, Feng, Zhenyong, Feng, Gou, Q., Guo, Y., He, H., Haibing, Hu, Hongbo, Hu, Iacovacci, Michele, Jia, H., Li, H., Li, J., Li, X., Liu, M., Ma, X., Mari, S., Ning, C., Qu, X., Shen, P., Sheng, X., Tan, Y., Wu, C., Wu, H., Yan, Y., Yang, Q., Yang, X., Yao, Z., Yuan, A., Zhang, H., Jilong, Zhang, Jianli, Zhang, Zhang, X., Zhou, X., Zhu, F., Zhu, Q., Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali' Staiti, G, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HBa, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, XB, Ruggieri, F, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLo, Zhang, JLi, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alí Staiti, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Physics, Nuclear and High Energy Physics, Antiparticle, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Settore FIS/01 - Fisica Sperimentale, Earth-Moon, Cosmic ray, magnetic spectrometer, High Energy Physics - Experiment, Nuclear physics, Earth's magnetic field, Antiproton, Antimatter, antiproton, Content (measure theory), Antiproton-Proton ratio, Cosmic rays, Extended Air Showers, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract

Cosmic ray antiprotons provide an important probe to study the cosmic ray propagation in the interstellar space and to investigate the existence of dark matter. Acting the Earth-Moon system as a magnetic spectrometer, paths of primary antiprotons are deflected in the opposite sense with respect to those of the protons in their way to the Earth. This effect allows, in principle, the search for antiparticles in the direction opposite to the observed deficit of cosmic rays due to the Moon (the so-called `Moon shadow'). The ARGO-YBJ experiment, located at the Yangbajing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l., 606 g/cm$^2$), is particularly effective in measuring the cosmic ray antimatter content via the observation of the cosmic rays shadowing effect due to: (1) good angular resolution, pointing accuracy and long-term stability; (2) low energy threshold; (3) real sensitivity to the geomagnetic field. Based on all the data recorded during the period from July 2006 through November 2009 and on a full Monte Carlo simulation, we searched for the existence of the shadow cast by antiprotons in the TeV energy region. No evidence of the existence of antiprotons is found in this energy region. Upper limits to the $\bar{p}/p$ flux ratio are set to 5 % at a median energy of 1.4 TeV and 6 % at 5 TeV with a confidence level of 90%. In the TeV energy range these limits are the lowest available., Comment: Contact authors: G. Di Sciascio (disciascio@roma2.infn.it) and R. Iuppa (iuppa@roma2.infn.it), INFN Sezione di Roma Tor Vergata, Roma, Italy

Published
2012

25. Calibration of the RPC charge readout in the ARGO-YBJ experiment

Author

M. Iacovacci, M. Zha, Hongbo Hu, C. Liu, A. Surdo, Y. B. Chen, Q. Y. Yang, Yicheng Guo, Y. X. Yan, Danzengluobu, X. H. Ma, P. Creti, B. Liberti, A. F. Yuan, Huihai He, G. Zizzi, P. F. Zhang, Haifeng Li, Paolo Bernardini, R. Santonico, X. C. Yang, X. J. Bi, X. Y. Zhang, R. Gargana, Minghui Liu, S. Z. Chen, X. X. Li, Labaciren, L. Zhang, A. Pagliaro, C. Cattaneo, F. Shi, A. Cappa, Irina James, Piero Vallania, X. B. Qu, S. Catalanotti, X. H. Ding, B. S. Wang, Zhaxisangzhu, P. Salvini, L. Perrone, G. Di Sciascio, A. K. Calabrese Melcarne, Jilong Zhang, Y. H. Tan, M. De Vincenzi, R. Cardarelli, S. M. Mari, Cunfeng Feng, G. D'Alí Staiti, E. Rossi, N. Cheng, Jianli Zhang, Paolo Montini, R. Iuppa, H. Y. Jia, S. Vernetto, C. Bacci, P. Camarri, G. Mancarella, J. K. K. Liu, C. Y. Wu, L. Saggese, Zihuang Cao, I. De Mitri, T. L. Chen, H. M. Zhang, M. Dattoli, H. Lu, G. Liguori, C. X. Liu, F. Galeazzi, B. Bartoli, T. Di Girolamo, P. Celio, G. Aielli, B. D'Ettorre Piazzoli, Bingwei Xu, Severino Angelo Maria Bussino, P. R. Shen, L. Xue, Q. B. Gou, Carlo Vigorito, Xiangdong Sheng, P. Pistilli, X. X. Zhou, P. Galeotti, Q. Huang, Haibing Hu, C. Bleve, Y. Zhang, D. Martello, Zhenyong Feng, A. Budano, S. Mastroianni, H. R. Wu, H. W. Wang, B. Z. Dai, F. Ruggieri, F. R. Zhu, M. Panareo, Q. Q. Zhu, P. Branchini, G. Marsella, X. R. Meng, C. Stanescu, Chang-Chun Ning, Zhaoyang Feng, S. W. Cui, J. Y. Li, Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, DE VINCENZI, Mario, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bi, XJ, Bussino, S, Calabrese Melcarne, AK, Chen, SZ, Chen, TL, Cui, SW, Dai, BZ, De Vincenzi, M, Ding, XH, Feng, CF, Feng, ZYa, Feng, ZYo, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Jia, HY, Li, HJ, Li, JY, Li, XX, Liu, CQ, Liu, MY, Ma, XH, Mari, SM, Meng, XR, Ning, CC, Qu XB, Shen, PR, Sheng, XD, Tan, YH, Wu, CY, Wu, HR, Yan, YX, Yang, QY, Yang, XC, Yuan, AF, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, XY, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Optical telescopes, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Camere a Piastre Resistive (RPC), Resistive plate chamber, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, law.invention, Telescope, Settore FIS/05 - Astronomia E Astrofisica, Optics, law, Coincident, Air showers, Calibration, Sea level, Instrumentation, Particle densities, Cosmic rays, Resistive Plate Chambers, Charge read-out, Extended Air Showers, Physics, Air showers, Charge readout, Dynamic range, Knee regions, Particle densities, Resistive plate chambers, Calibration, Charged particles, Cosmic rays, Experiments, Optical telescopes, Sea level, Telescopes, Particle spectrometers, Resistive touchscreen, Scintillation, Dynamic range, Charge readout, business.industry, Charged particles, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Charged particle, Air shower, Calibrazione della Risposta Analogica di RPC, Knee regions, Lettura Analogica di RPC, Resistive plate chambers, business, Experiments, Telescopes
Abstract

""The charge readout of Resistive Plate Chambers (RPCs) is implemented in the ARGO-YBJ experiment to measure the charged particle density of the shower front up to 10^4\\\/m^2, enabling the study of the primary cosmic rays with energies in the ''knee'' region. As the first time for RPCs being used this way, a telescope with RPCs and scintillation detectors is setup to calibrate the number of charged particles hitting a RPC versus its charge readout. Air shower particles are taken as the calibration beam. The telescope was tested at sea level and then moved to the ARGO-YBJ site for coincident operation with the ARGO-YBJ experiment. The charge readout shows good linearity with the particle density in the dynamic range (up to 200\\\/m^2).""

Published
2012

26. Gamma-ray astronomy with ARGO-YBJ

Author

The ARGO YBJ Collaboration B. Bartoli, 1, 2 P. Bernardini, 3, 4 X. J. Bi, 5 C. Bleve, 6 I. Bolognino, 7, 8 P. Branchini, 9 A. Budano, 9 A. K. Calabrese Melcarne, 10 P. Camarri, 12 Z. Cao, 5 R. Cardarelli, 12 S. Catalanotti, 2 C. Cattaneo, 8 S. Z. Chen, 5 T. L. Chen, 13 Y. Chen, 5 P. Creti, 4 S. W. Cui, 14 B. Z. Dai, 15 G. D’Al´ı Staiti, 17 Danzengluobu, 13 M. Dattoli, 18, 19, 20 I. De Mitri, 4 B. D’Ettorre Piazzoli, 2 T. Di Girolamo, 2 X. H. Ding, 13 G. Di Sciascio, 12 C. F. Feng, 21 Zhaoyang Feng, 13 Zhenyong Feng, 22 E. Giroletti, 8 Q. B. Gou, 5 Y. Q. Guo, 5 H. H. He, 5 Haibing Hu, 13 Hongbo Hu, 5 Q. Huang, 22 M. Iacovacci, 2 R. Iuppa, 12 I. James, 9 H. Y. Jia, 22 Labaciren, 13 H. J. Li, 13 J. Y. Li, 21 X. X. Li, 5 G. Liguori, 8 C. Liu, 5 C. Q. Liu, 15 J. Liu, 15 M. Y. Liu, 13 H. Lu, 5 X. H. Ma, 5 G. Mancarella, 3, 4, 9 G. Marsella, 4, 24 D. Martello, 4 S. Mastroianni, 2 P. Montini, 9 C. C. Ning, 13 A. Pagliaro, 25 M. Panareo, 24 B. Panico, 12 L. Perrone, 24 P. Pistilli, 9 X. B. Qu, 21 F. Ruggieri, 9 P. Salvini, 8 R. Santonico, 12 P. R. Shen, 5 X. D. Sheng, 5 F. Shi, 5 C. Stanescu, 9 A. Surdo, 4 Y. H. Tan, 5 P. Vallania, 19 S. Vernetto, 19 C. Vigorito, 20 B. Wang, 5 H. Wang, 5 C. Y. Wu, 5 H. R. Wu, 5 B. Xu, 22 L. Xue, 21 X. X. Yan, 15 Q. Y. Yang, 15 X. C. Yang, 15 Z. G. Yao, 5 A. F. Yuan, 13 M. Zha, 5 H. M. Zhang, 5 Jilong Zhang, 5 Jianli Zhang, 5 L. Zhang, 15 P. Zhang, 15 X. Y. Zhang, 21 Y. Zhang, 5 Zhaxiciren, 13 Zhaxisangzhu, 13 X. X. Zhou, 22 F. R. Zhu, 22 Q. Q. Zhu, 5, G. Zizzi10, MARI, Stefano Maria, Bartoli, The ARGO YBJ Collaboration B., Bernardini, 2 P., 4 X. J., Bi, Bleve, 5 C., Bolognino, 6 I., Branchini, 8 P., Budano, 9 A., Calabrese Melcarne, 9 A. K., Camarri, 10 P., Cao, 12 Z., Cardarelli, 5 R., Catalanotti, 12 S., Cattaneo, 2 C., Chen, 8 S. Z., Chen, 5 T. L., Chen, 13 Y., Creti, 5 P., Cui, 4 S. W., Dai, 14 B. Z., D’Al´ı Staiti, 15 G., Danzengluobu, 17, Dattoli, 13 M., 19, 18, De Mitri, 20 I., D’Ettorre Piazzoli, 4 B., Di Girolamo, 2 T., Ding, 2 X. H., Di Sciascio, 13 G., Feng, 12 C. F., 21 Zhaoyang Feng, 13 Zhenyong Feng, Giroletti, 22 E., Gou, 8 Q. B., Guo, 5 Y. Q., 5 H. H., He, 5 Haibing Hu, 13 Hongbo Hu, Huang, 5 Q., Iacovacci, 22 M., Iuppa, 2 R., James, 12 I., Jia, 9 H. Y., Labaciren, 22, 13 H. J., Li, 13 J. Y., Li, 21 X. X., Li, Liguori, 5 G., Liu, 8 C., Liu, 5 C. Q., Liu, 15 J., Liu, 15 M. Y., 13 H., Lu, 5 X. H., Ma, Mancarella, 5 G., 3, 4, Mari, Stefano Maria, Marsella, 9 G., Martello, 24 D., Mastroianni, 4 S., Montini, 2 P., Ning, 9 C. C., Pagliaro, 13 A., Panareo, 25 M., Panico, 24 B., Perrone, 12 L., Pistilli, 24 P., 9 X. B., Qu, Ruggieri, 21 F., Salvini, 9 P., Santonico, 8 R., Shen, 12 P. R., Sheng, 5 X. D., Shi, 5 F., Stanescu, 5 C., Surdo, 9 A., Tan, 4 Y. H., Vallania, 5 P., Vernetto, 19 S., Vigorito, 19 C., Wang, 20 B., Wang, 5 H., 5 C. Y., Wu, 5 H. R., Wu, 5 B., Xu, Xue, 22 L., Yan, 21 X. X., Yang, 15 Q. Y., Yang, 15 X. C., Yao, 15 Z. G., Yuan, 5 A. F., Zha, 13 M., Zhang, 5 H. M., 5 Jilong Zhang, 5 Jianli Zhang, Zhang, 5 L., Zhang, 15 P., Zhang, 15 X. Y., Zhang, 21 Y., Zhaxiciren, 5, Zhaxisangzhu, 13, Zhou, 13 X. X., Zhu, 22 F. R., Zhu, 22 Q. Q., and Zizzi10, G.

Abstract

ARGO-YBJ is a full coverage air shower array located at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l., 606 g/cm2) recording data with a duty cycle ≥85% and an energy threshold of a few hundred GeV. In this paper the latest results in Gamma-Ray Astronomy are summarized.

Published
2012

27. Gamma-Ray Astronomy with ARGO-YBJ

Author

B. Bartoli, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Ali´ Staiti, Danzengluobu, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Huo, Hongbo Hue, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, B. Panico, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, JilongZhang, JianliZhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali´ Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
TeV gamma-ray flares – Gamma rays: observations – Galaxy: Crab Nebula [Galaxy]
Abstract

ARGO-YBJ is a full coverage air shower array located at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l., 606 g/cm2) recording data with a duty cycle 85% and an energy threshold of a few hundred GeV. In this paper the latest results in Gamma-Ray Astronomy are summarized.

Published
2012

28. Light-component spectrum of the primary cosmic rays in the multi-TeV region measured by the ARGO-YBJ experiment

Author

X. C. Yang, B. Bartoli, Zhenyong Feng, B. Panico, C. Liu, P. R. Shen, Irina James, X. H. Ma, J. K. K. Liu, P. Salvini, G. D'Alí Staiti, P. Vallania, Q. Q. Zhu, P. Pistilli, H. M. Zhang, X. X. Zhou, Giovanni Mancarella, G. Di Sciascio, B. D'Ettorre Piazzoli, P. Creti, R. Santonico, X. X. Li, Y. B. Chen, H. J. Li, Carla Bleve, H. R. Wu, Hongbo Hu, H. Y. Jia, L. Xue, C. F. Feng, Bingwei Xu, C. Y. Wu, A. Surdo, L. Perrone, Hong-peng Lu, C. Q. Liu, Chang-Chun Ning, Zhaoyang Feng, Q. Huang, I. De Mitri, Q. B. Gou, X. Y. Zhang, T. Di Girolamo, Paolo Camarri, T. L. Chen, M. Iacovacci, B. Z. Dai, X. X. Yan, F. R. Zhu, P. F. Zhang, X. J. Bi, Y. Q. Guo, S. Catalanotti, S. W. Cui, S. Z. Chen, Jianli Zhang, P. Bernardini, F. Ruggieri, Cristian Stanescu, P. Branchini, M. Panareo, Zihuang Cao, A. F. Yuan, Carlo Vigorito, B. S. Wang, Longzhou Zhang, Zhaxisangzhu, Haibing Hu, E. Giroletti, Z. G. Yao, S. M. Mari, Antonio Budano, Y. Zhang, Labaciren, D. Martello, M. Zha, C. Cattaneo, A. K. Calabrese Melcarne, Paolo Montini, G. Marsella, R. Iuppa, S. Vernetto, Danzengluobu, X. D. Sheng, J. Y. Li, H.H. He, M. Dattoli, I. Bolognino, M. Y. Liu, Q. Y. Yang, G. Zizzi, X. B. Qu, X. H. Ding, Roberto Cardarelli, Y. H. Tan, A. Pagliaro, G. Liguori, Huaguang Wang, Fudong Shi, S. Mastroianni, Zhaxiciren, Jilong Zhang, Bartoli, B., Bernardini, P., Bi, X. J., Bleve, C., Bolognino, I., Branchini, P., Budano, A., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cardarelli, R., Catalanotti, S., Cattaneo, C., Chen, S. Z., Chen, T. L., Chen, Y., Creti, P., Cui, S. W., Dai, B. Z., D'Ali Staiti, G., Danzengluobu, Dattoli, M., De Mitri, I., D'Ettorre Piazzoli, B., Di Girolamo, T., Ding, X. H., Di Sciascio, G., Feng, C. F., Feng, Z., Giroletti, E., Gou, Q. B., Guo, Y. Q., He, H. H., Hu, H., Huang, Q., Iacovacci, M., Iuppa, R., James, I., Jia, H. Y., Labaciren, Li, H. J., Li, J. Y., Li, X. X., Liguori, G., Liu, C., Liu, C. Q., Liu, J., Liu, M. Y., Lu, H., Ma, X. H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Montini, P., Ning, C. C., Pagliaro, A., Panareo, M., Panico, B., Perrone, L., Pistilli, P., Qu, X. B., Ruggieri, F., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, B., Wang, H., Wu, C. Y., Wu, H. R., Xu, B., Xue, L., Yan, X. X., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, J., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhaxiciren, Zhaxisangzhu, Zhou, X. X., Zhu, F. R., Zhu, Q. Q., Zizzi, G., Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Melcarne, Akc, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Chen, Sz, Chen, Tl, Chen, Y, Creti, P, Cui, Sw, Dai, Bz, Staiti, Gd, Dattoli, M, De Mitri, I, Piazzoli, Bd, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Giroletti, E, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liguori, G, Liu, C, Liu, Cq, Liu, J, Liu, My, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, Xb, Ruggieri, F, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Xx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Bartoli, Bruno, X. J., Bi, A. K. C., Catalanotti, Sergio, Staiti, G. D., Mitri, I. D., D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Sciascio, G. D., Feng, Z. Y., H. H., He, H. B., Hu, Iacovacci, Michele, H. J., Li, J. Y., Li, X. X., Li, X. H., Ma, X. B., Qu, C. Y., Wu, H. R., Wu, Zhang, J. L., B., Bartoli, Bernardini, Paolo, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, E., Giroletti, Q. B., Gou, Y. Q., Guo, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, B., Xu, L., Xue, X. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bi, XJ, Calabrese Melcarne, AK, Chen, SZ, Chen, TL, Cui, SW, Dai, BZ, D'ALI'STAITI, G, D’Ettorre Piazzoli, B, Ding, XH, Feng, CF, Feng, ZYa, Feng, ZYo, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, James, J, Jia, HY, Li, HJ, Li, JY, Li, XX, Liu, CQ, Liu, MY, Ma, XH, Mari, S, Ning, CC, Panareo, P, Qu, XB, Shen, PR, Sheng, XD, Tan, YH, Wu, CY, Wu, HR, Yan, XX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, XY, Zhou, XX, Zhu, FR, Zhu, QQ, and Zizzi, G

Subjects
Extended Air Showers, Cosmic Rays, Gamma Ray sources, Nuclear and High Energy Physics, Proton, TIBET, Astrophysics::High Energy Astrophysical Phenomena, Extensive air shower, chemistry.chemical_element, Cosmic ray, HELIUM SPECTRA, Astrophysics, PROTON, Bayesian method, CASCADES, Spectral line, Settore FIS/05 - Astronomia E Astrofisica, Nuclear magnetic resonance, Cosmic-ray observatory, Helium, Physics, Range (particle radiation), ENERGY-RANGE, BALLOON EXPERIMENT, NUCLEI, Settore FIS/01 - Fisica Sperimentale, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, light component spectrum, chemistry, Energy (signal processing), SYSTEM
Abstract

The ARGO-YBJ experiment detects extensive air showers in a wide energy range by means of a full-coverage detector which is in stable data taking in its full configuration since November 2007 at the YBJ International Cosmic Ray Observatory (4300 m a.s.l., Tibet, People's Republic of China). In this paper the measurement of the light-component spectrum of primary cosmic rays in the energy region $(5\textdiv{}200)\text{ }\text{ }\mathrm{TeV}$ is reported. The method exploited to analyze the experimental data is based on a Bayesian procedure. The measured intensities of the light component are consistent with the recent CREAM results and higher than that obtained adding the proton and helium spectra reported by the RUNJOB experiment.

Published
2012

29. Gamma-ray astronomy and cosmic-ray physics with ARGO-YBJ

Author

The ARGO YBJ Collaboration B. Bartoli, 1, 2 P. Bernardini, 3, 4 X. J. Bi, 5 C. Bleve, 6 I. Bolognino, 7, 8 P. Branchini, 9 A. Budano, 9 A. K. Calabrese Melcarne, 10 P. Camarri, 12 Z. Cao, 5 R. Cardarelli, 12 S. Catalanotti, 2 C. Cattaneo, 8 S. Z. Chen, 5 T. L. Chen, 13 Y. Chen, 5 P. Creti, 4 S. W. Cui, 14 B. Z. Dai, 15 G. D’Al´ı Staiti, 17 Danzengluobu, 13 M. Dattoli, 18, 19, 20 I. De Mitri, 4 B. D’Ettorre Piazzoli, 2 T. Di Girolamo, 2 X. H. Ding, 13 G. Di Sciascio, 12 C. F. Feng, 21 Zhaoyang Feng, 13 Zhenyong Feng, 22 E. Giroletti, 8 Q. B. Gou, 5 Y. Q. Guo, 5 H. H. He, 5 Haibing Hu, 13 Hongbo Hu, 5 Q. Huang, 22 M. Iacovacci, 2 R. Iuppa, 12 I. James, 9 H. Y. Jia, 22 Labaciren, 13 H. J. Li, 13 J. Y. Li, 21 X. X. Li, 5 G. Liguori, 8 C. Liu, 5 C. Q. Liu, 15 J. Liu, 15 M. Y. Liu, 13 H. Lu, 5 X. H. Ma, 5 G. Mancarella, 3, 4, 9 G. Marsella, 4, 24 D. Martello, 4 S. Mastroianni, 2 P. Montini, 9 C. C. Ning, 13 A. Pagliaro, 25 M. Panareo, 24 B. Panico, 12 L. Perrone, 24 P. Pistilli, 9 X. B. Qu, 21 F. Ruggieri, 9 P. Salvini, 8 R. Santonico, 12 P. R. Shen, 5 X. D. Sheng, 5 F. Shi, 5 C. Stanescu, 9 A. Surdo, 4 Y. H. Tan, 5 P. Vallania, 19 S. Vernetto, 19 C. Vigorito, 20 B. Wang, 5 H. Wang, 5 C. Y. Wu, 5 H. R. Wu, 5 B. Xu, 22 L. Xue, 21 X. X. Yan, 15 Q. Y. Yang, 15 X. C. Yang, 15 Z. G. Yao, 5 A. F. Yuan, 13 M. Zha, 5 H. M. Zhang, 5 Jilong Zhang, 5 Jianli Zhang, 5 L. Zhang, 15 P. Zhang, 15 X. Y. Zhang, 21 Y. Zhang, 5 Zhaxiciren, 13 Zhaxisangzhu, 13 X. X. Zhou, 22 F. R. Zhu, 22 Q. Q. Zhu, 5, G. Zizzi10, MARI, Stefano Maria, Bartoli, The ARGO YBJ Collaboration B., Bernardini, 2 P., 4 X. J., Bi, Bleve, 5 C., Bolognino, 6 I., Branchini, 8 P., Budano, 9 A., Calabrese Melcarne, 9 A. K., Camarri, 10 P., Cao, 12 Z., Cardarelli, 5 R., Catalanotti, 12 S., Cattaneo, 2 C., Chen, 8 S. Z., Chen, 5 T. L., Chen, 13 Y., Creti, 5 P., Cui, 4 S. W., Dai, 14 B. Z., D’Al´ı Staiti, 15 G., Danzengluobu, 17, Dattoli, 13 M., 19, 18, De Mitri, 20 I., D’Ettorre Piazzoli, 4 B., Di Girolamo, 2 T., Ding, 2 X. H., Di Sciascio, 13 G., Feng, 12 C. F., 21 Zhaoyang Feng, 13 Zhenyong Feng, Giroletti, 22 E., Gou, 8 Q. B., Guo, 5 Y. Q., 5 H. H., He, 5 Haibing Hu, 13 Hongbo Hu, Huang, 5 Q., Iacovacci, 22 M., Iuppa, 2 R., James, 12 I., Jia, 9 H. Y., Labaciren, 22, 13 H. J., Li, 13 J. Y., Li, 21 X. X., Li, Liguori, 5 G., Liu, 8 C., Liu, 5 C. Q., Liu, 15 J., Liu, 15 M. Y., 13 H., Lu, 5 X. H., Ma, Mancarella, 5 G., 3, 4, Mari, Stefano Maria, Marsella, 9 G., Martello, 24 D., Mastroianni, 4 S., Montini, 2 P., Ning, 9 C. C., Pagliaro, 13 A., Panareo, 25 M., Panico, 24 B., Perrone, 12 L., Pistilli, 24 P., 9 X. B., Qu, Ruggieri, 21 F., Salvini, 9 P., Santonico, 8 R., Shen, 12 P. R., Sheng, 5 X. D., Shi, 5 F., Stanescu, 5 C., Surdo, 9 A., Tan, 4 Y. H., Vallania, 5 P., Vernetto, 19 S., Vigorito, 19 C., Wang, 20 B., Wang, 5 H., 5 C. Y., Wu, 5 H. R., Wu, 5 B., Xu, Xue, 22 L., Yan, 21 X. X., Yang, 15 Q. Y., Yang, 15 X. C., Yao, 15 Z. G., Yuan, 5 A. F., Zha, 13 M., Zhang, 5 H. M., 5 Jilong Zhang, 5 Jianli Zhang, Zhang, 5 L., Zhang, 15 P., Zhang, 15 X. Y., Zhang, 21 Y., Zhaxiciren, 5, Zhaxisangzhu, 13, Zhou, 13 X. X., Zhu, 22 F. R., Zhu, 22 Q. Q., and Zizzi10, G.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics
Abstract

The ARGO-YBJ detector, located 4300 m a.s.l. on the Tibet plateau, is a ground-based, full- coverage array of Resistive Plate Chambers (RPCs) covering a surface of 78×74 m2, surrounded by a guard ring of RPCs enclosing a total surface of about 11000 m2. ARGO-YBJ was designed to detect extensive air showers generated by cosmic rays and gamma rays with primary energy greater than few hundred GeV, in order to study the region of the cosmic-ray spectrum out of the reach of both satellite-based experiments and traditional ground-based arrays. The experiment has been running with its complete layout since November 2007, collecting over 2:5×1011 events. The main results obtained by ARGO-YBJ will be presented here, and specifically: the monitoring of astronomical gamma-ray sources, such as the Crab nebula and the MRK 421 AGN, the moon shadow, the medium-scale anisotropy map, the proton-proton inelastic cross section at center-of- mass energy between 70 and 500 GeV where no accelerator data are available.

Published
2011

30. Long-term monitor of Mrk 421 TeV emission using ARGO-YBJ experiment

Author

B. Bartoli, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alı Staiti, Danzengluobu, M. Dattoli, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, B. Panico, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, Jilong Zhang, Jianli Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxiciren, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
gamma ray observations, Markarian 421, BL Lacertae object
Abstract

ARGO-YBJ is an air shower detector array with a fully covered layer of Resistive Plate Chambers. It is operated with a high duty cycle and a large field of view. It monitors continuously the northern sky at energies above 0.3 TeV. In this paper, we report a long-term monitoring of Mrk 421 over the period from November 2007 to February 2010. Meanwhile, this source was observed by the satellite-borne experiments RXTE and Swift in the X-ray band. Mrk 421 was very active especially in the first half of 2008. Many flares are observed in both X-ray and gamma-ray bands simultaneously. The gamma-ray flux observed by ARGO-YBJ has a clear correlation with the X-ray flux. No lag longer than 1 day between the X-ray and gamma-ray photons is found. The evolution of the spectral energy distribution is investigated by measuring indices at four different flux levels. Hardening of the spectra is observed in both X-ray and gamma-ray bands. The gamma-ray flux increases quadratically with the simultaneously measured X-ray flux. All these observational results strongly favor the synchrotron self-Compton process as the underlying radiative mechanism.

Published
2011

31. Observation of the cosmic ray moon shadowing effect with the ARGO-YBJ experiment

Author

B. Bartoli, P. Bernardini, X. J. Bi, C. Bleve, I. Bolognino, P. Branchini, A. Budano, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, T. L. Chen, Y. Chen, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alí Staiti, null Danzengluobu, M. Dattoli, I. De Mitri, B. D’Ettorre Piazzoli, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, E. Giroletti, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, null Labaciren, H. J. Li, J. Y. Li, X. X. Li, G. Liguori, C. Liu, C. Q. Liu, J. Liu, M. Y. Liu, H. Lu, X. H. Ma, G. Mancarella, S. M. Mari, G. Marsella, D. Martello, S. Mastroianni, P. Montini, C. C. Ning, A. Pagliaro, M. Panareo, B. Panico, L. Perrone, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, P. Salvini, R. Santonico, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, Q. Y. Yang, X. C. Yang, Z. G. Yao, A. F. Yuan, M. Zha, H. M. Zhang, Jilong Zhang, Jianli Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, null Zhaxiciren, null Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Melcarne, Akc, Camarri, P, Cao, Z, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Creti, P, Cui, Sw, Dai, Bz, Staiti, Gd, Danzengluobu, Dattoli, M, De Mitri, I, Piazzoli, Bd, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Galeazzi, F, Giroletti, E, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liguori, G, Liu, C, Liu, Cq, Liu, J, Liu, My, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´ Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, D'Ali' Staiti, G, Bi, XJ, Calabrese Melcarne, AK, Chen, SZ, Chen, TL, Cui, SW, Dai, BZ, D’Alı Staiti, G, D’Ettorre Piazzoli, B, Ding, XH, Feng, CF, Feng, ZYa, Feng, ZYo, Gou, QB, Guo, YQ, He, HH, Hu, HBi, Hu, HBo, Jia, HY, Li, HJ, Li, JY, Li, XX, Liu, CQ, Liu, MY, Ma, XH, Mari, SM, Ning, CC, Qu, XB, Shen, PR, Sheng, XD, Tan, YH, Wu, CY, Wu, HR, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, XY, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, and Zizzi, G

Subjects
Point spread function, Nuclear and High Energy Physics, Cosmic Rays, Gamma Astronomy, Extended Air Showers, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Cosmic ray, Astrophysics, 01 natural sciences, Standard deviation, Physics::Geophysics, Raggi cosmici, Settore FIS/05 - Astronomia E Astrofisica, geomagnetic field, 0103 physical sciences, 010303 astronomy & astrophysics, Physics, 010308 nuclear & particles physics, Ombra della luna, Apparati di sciame, Detector, Settore FIS/01 - Fisica Sperimentale, Moon shadow, Astronomy, Magnetic field, Earth's magnetic field, Air shower, 13. Climate action, Physics::Space Physics
Abstract

Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called Moon shadow). The Moon shadow is an important tool to determine the performance of an air shower array. Indeed, the westward displacement of the shadow center, due to the bending effect of the geomagnetic field on the propagation of cosmic rays, allows the setting of the absolute rigidity scale of the primary particles inducing the showers recorded by the detector. In addition, the shape of the shadow permits to determine the detector point spread function, while the position of the deficit at high energies allows the evaluation of its absolute pointing accuracy. In this paper we present the observation of the cosmic ray Moon shadowing effect carried out by the ARGO-YBJ experiment in the multi-TeV energy region with high statistical significance (55 standard deviations). By means of an accurate Monte Carlo simulation of the cosmic rays propagation in the Earth-Moon system, we have studied separately the effect of the geomagnetic field and of the detector point spread function on the observed shadow. The angular resolution as a function of the particle multiplicity and the pointing accuracy have been obtained. The primary energy of detected showers has been estimated by measuring the westward displacement as a function of the particle multiplicity, thus calibrating the relation between shower size and cosmic ray energy. The stability of the detector on a monthly basis has been checked by monitoring the position and the deficit of the Moon shadow. Finally, we have studied with high statistical accuracy the shadowing effect in the day/’’night’’ time looking for possible effect induced by the solar wind.

Published
2011

32. Mean Interplanetary Magnetic Field Measurement Using the ARGO-YBJ Experiment

Author

X. X. Li, Zhenyong Feng, L. Zhang, B. D'Ettorre Piazzoli, L. Xue, G. Mancarella, Q. B. Gou, A. Cappa, M. Zha, F. R. Zhu, M. Panareo, B. Z. Dai, M. Iacovacci, Piero Vallania, P. Creti, Danzengluobu, F. Ruggieri, A. K. Calabrese Melcarne, L. Perrone, P. Salvini, R. Cardarelli, G. Marsella, Q. Q. Zhu, Y. Q. Guo, P. Branchini, H. Y. Jia, G. Aielli, R. Santonico, H. H. He, C. Bacci, S. M. Mari, Zhengguo Cao, X. C. Yang, B. S. Wang, A. Pagliaro, Q. Y. Yang, Bingwei Xu, P. F. Zhang, E. Giroletti, Severino Angelo Maria Bussino, S. W. Cui, Hongbo Hu, A. Surdo, C. F. Feng, X. J. Bi, H. R. Wu, I. De Mitri, X. R. Meng, C. Stanescu, Irina James, A. F. Yuan, Chang-Chun Ning, Zhaoyang Feng, J. Y. Li, Jilong Zhang, T. Di Girolamo, F. Shi, Jianli Zhang, T. L. Chen, H. M. Zhang, G. Di Sciascio, Carlo Vigorito, P. Celio, C. Y. Wu, M. Y. Liu, M. De Vincenzi, Haibing Hu, R. Gargana, I. Bolognino, B. Bartoli, H. J. Li, X. D. Sheng, C. Bleve, Y. B. Chen, S. Z. Chen, L. Saggese, Y. Zhang, B. Liberti, Paolo Bernardini, D. Martello, X. B. Qu, X. H. Ding, Labaciren, J. K. K. Liu, P. Pistilli, X. X. Zhou, G. D'Alí Staiti, Y. H. Tan, P. Galeotti, Q. Huang, X. Y. Zhang, C. Liu, X. H. Ma, G. Liguori, C. X. Liu, Zhaxisangzhu, S. Catalanotti, Z. G. Yao, Y. X. Yan, E. Rossi, M. Dattoli, H. Lu, Paolo Montini, R. Iuppa, and G. Zizzi, P. Camarri, H. W. Wang, S. Vernetto, F. Galeazzi, A. Budano, S. Mastroianni, C. Cattaneo, P. R. Shen, Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Bussino, S, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Gargana, R, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liberti, B, Liguori, G, Liu, C, Liu, CQ, Liu, MY, Liu, J, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Meng, XR, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu XB, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D'Alí Staiti, M., Dattoli, DE MITRI, Ivan, B., D'Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Bi, Xj, Bussino, Severino Angelo Maria, Melcarne, Akc, Chen, Sz, Chen, Tl, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, DE VINCENZI, Mario, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Meng, Xr, Ning, Cc, Qu, Xb, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Yan, Yx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Solar System, Field (physics), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, magnetic field, Cosmic ray, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Settore FIS/05 - Astronomia E Astrofisica, Shadow, Astrophysics::Solar and Stellar Astrophysics, Interplanetary magnetic field, cosmic ray, Solar and Stellar Astrophysics (astro-ph.SR), media_common, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Cosmic Rays, Gamma Sources, Extended Air Showers, Solar wind, Magnetic field, Solar wind, Astrophysics - Solar and Stellar Astrophysics, solar wind, Space and Planetary Science, Sky, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The sun blocks cosmic ray particles from outside the solar system, forming a detectable shadow in the sky map of cosmic rays detected by the ARGO-YBJ experiment in Tibet. Because the cosmic ray particles are positive charged, the magnetic field between the sun and the earth deflects them from straight trajectories and results in a shift of the shadow from the true location of the sun. Here we show that the shift measures the intensity of the field which is transported by the solar wind from the sun to the earth., Comment: 6 papges,3 figures

Published
2011
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33. Early warning for VHE gamma-ray flares with the ARGO-YBJ detector

Author

Y. Q. Guo, B. D'Ettorre Piazzoli, Haibing Hu, H. J. Li, H. R. Wu, C. Bleve, Y. Zhang, L. Xue, X. B. Qu, D. Martello, C. Stanescu, Chang-Chun Ning, B. Bartoli, R. Santonico, Zhaoyang Feng, X. H. Ding, Hong-peng Lu, Jilong Zhang, F. Galeazzi, B. Z. Dai, F. R. Zhu, Y. X. Yan, L. Zhang, F. Ruggieri, Piero Vallania, B. Panico, F. Shi, Y. H. Tan, Zhenyong Feng, C. Liu, P. Branchini, Danzengluobu, X. C. Yang, M. Dattoli, A. K. Calabrese Melcarne, Hongbo Hu, P. Pistilli, X. X. Zhou, C. Y. Wu, M. Iacovacci, M. Zha, X. H. Ma, A. Surdo, R. Cardarelli, C. F. Feng, M. Panareo, J. K. K. Liu, A. Cappa, G. Marsella, Bingwei Xu, E. Giroletti, X. Y. Zhang, Zhiguo Yao, H. H. He, Q. Q. Zhu, Q. B. Gou, A. F. Yuan, Minghui Liu, P. Creti, P. Galeotti, A. Budano, P. Salvini, Labaciren, Jianli Zhang, A. Pagliaro, I. De Mitri, X. D. Sheng, P. R. Shen, Paolo Bernardini, S. Mastroianni, T. Di Girolamo, T. L. Chen, H. M. Zhang, P. Celio, Q. Huang, Q. Y. Yang, I. Bolognino, G. Liguori, Zhaxiciren, G. Zizzi, J. Y. Li, G. Di Sciascio, C. X. Liu, H. W. Wang, G. D'Alí Staiti, Y. B. Chen, H. Y. Jia, Carlo Vigorito, Irina James, G. Mancarella, Paolo Camarri, L. Perrone, Zihuang Cao, X. X. Li, B. S. Wang, Zhaxisangzhu, S. M. Mari, P. F. Zhang, X. J. Bi, S. Z. Chen, C. Cattaneo, E. Rossi, Paolo Montini, R. Iuppa, S. Vernetto, S. Catalanotti, S. W. Cui, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Bolognino, I, Branchini, P, Budano, A, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, TL, Chen, Y, Creti, P, Cui, SW, Dai, BZ, D’Ali' Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D’Ettorre Piazzoli, B, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, CF, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Giroletti, E, Gou, QB, Guo, YQ, He, HH, Hu, HBa, Hu, HBo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Panico, B, Perrone, L, Pistilli, P, Qu, XB, Rossi, E, Ruggieri, F, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yao, ZG, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLo, Zhang, JLi, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxiciren, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, Iacovacci, Michele, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, I., Bolognino, P., Branchini, A., Budano, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, T. L., Chen, Y., Chen, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alı´staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, E., Giroletti, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Huo, Hongbo, Hue, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, G., Liguori, C., Liu, C. Q., Liu, J., Liu, M. Y., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, B., Panico, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, Z. G., Yao, A. F., Yuan, M., Zha, H. M., Zhang, Jilongzhang, Jianlizhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxiciren, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Barton, B, Bi, Xj, Melcarne, Akc, Chen, Sz, Chen, Tl, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Ilacovacci, M, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Ning, Cc, Qu, Xb, Santonicoi, R, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Xu, B, Yan, Yx, Yang, Qy, Yang, Xc, Yao, Zg, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Wide field of view, Nuclear and High Energy Physics, Monitoring, Astrophysics::High Energy Astrophysical Phenomena, ARGO-YBJ, Flaring phenomenon, VHE extragalactic source, Astrophysics, Settore FIS/05 - Astronomia E Astrofisica, Instrumentation, Sorgenti VHE extragalattiche, Argo, Cherenkov radiation, Physics, Fenomeni transienti, Warning system, Detector, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Monitoring Flaring Phenomenon, Astronomy, Wide field, Duty cycle, Ampio campo di vista, Flaring phenomena, VHE extragalactic sources, Gamma Ray Bursts, Large Field of view telescope, ARGO-YBJ, Gamma-ray burst
Abstract

Detecting and monitoring emissions from flaring gamma-ray sources in the very-high-energy (VHE, > 100 GeV) band is a very important topic in gamma-ray astronomy. The ARGO-YBJ detector is characterized by a high duty cycle and a wide field of view. Therefore, it is particularly capable of detecting flares from extragalactic objects. Based on fast reconstruction and analysis, real-time monitoring of 33 selected VHE extragalactic sources is implemented. Flares exceeding a specific threshold are reported timely, hence enabling the follow-up observation of these objects using more sensitive detectors, such as Cherenkov telescopes. (C) 2011 Elsevier B.V. All rights reserved.

Published
2011

34. Gamma-ray flares from Mrk421 in 2008 observed with the ARGO-YBJ experiment

Author

G. AIELLI, C. BACCI, B. BARTOLI, X. J. BI, C. BLEVE, P. BRANCHINI, A. BUDANO, S. BUSSINO, A. K. CALABRESE MELCARNE, P. CAMARRI, Z. CAO, A. CAPPA, R. CARDARELLI, S. CATALANOTTI, C. CATTANEO, P. CELIO, S. Z. CHEN, Y. CHEN, N. CHENG, P. CRETI, S. W. CUI, B. Z. DAI, G. D’ALÍ STAITI, DANZENGLUOBU, M. DATTOLI, B. D’ETTORRE PIAZZOLI, M. DE VINCENZI, T. DI GIROLAMO, X. H. DING, G. DI SCIASCIO, C. F. FENG, ZHAOYANG FENG, ZHENYONG FENG, F. GALEAZZI, P. GALEOTTI, R. GARGANA, Q. B. GOU, Y. Q. GUO, H. H. HE, HAIBING HU, HONGBO HU, Q. HUANG, M. IACOVACCI, R. IUPPA, I. JAMES, H. Y. JIA, LABACIREN, H. J. LI, J. Y. LI, X. X. LI, B. LIBERTI, G. LIGUORI, C. LIU, C. Q. LIU, M. Y. LIU, J. LIU, H. LU, X. H. MA, S. M. MARI, S. MASTROIANNI, X. R. MENG, P. MONTINI, C. C. NING, A. PAGLIARO, P. PISTILLI, X. B. QU, E. ROSSI, F. RUGGIERI, L. SAGGESE, P. SALVINI, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, C. VIGORITO, B. WANG, H. WANG, C. Y. WU, H. R. WU, B. XU, L. XUE, Y. X. YAN, Q. Y. YANG, X. C. YANG, A. F. YUAN, M. ZHA, H. M. ZHANG, JILONG ZHANG, JIANLI ZHANG, L. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOU, F. R. ZHU, Q. Q. ZHU, G. ZIZZI, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., CALABRESE MELCARNE, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’ALÍ STAITI, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’ETTORRE PIAZZOLI, M., DE VINCENZI, T., DI GIROLAMO, X. H., Ding, G., DI SCIASCIO, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
TeV gamma-ray flares – Gamma rays: observations [Mrk421 – Galaxy]
Abstract

In 2008, the blazar Mrk421 entered in a very active phase and was one of the brightest sources in the sky at TeV energies, showing strong and frequent flaring. We searched for gamma-ray emission at energies E>0.8 TeV during the whole 2008 with the ARGO-YBJ experiment, a full coverage air shower detector located at Yangbajing (4300 m a.s.l., Tibet, P.R. China). The observed signal is not constant and in correlation with X-ray measurements. The average emission, during the active period of the source, was about twice the Crab Nebula level. This paper concentrates on 2008 June when the Mrk421 flaring activity has been studied from optical to 100 MeV gamma rays, and only partially up to TeV energies, since the moonlight hampered the Cherenkov telescope observations after 8 June. Our data complete these observations, with the detection of a second flare of intensity of about 7 Crab units on June 11-13, with a statistical significance of 4.2 standard deviations. The observed flux is consistent with a prediction made in the framework of the Synchrotron Self-Compton model, in which the flare is caused by a rapid acceleration of leptons in the jet.

Published
2010

35. Operation and performance of RPCs in the ARGO-YBJ experiment

Author

THE ARGO YBJ C.O.L.L.A.B.O.R.A.T.I.O.N.G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. DeVincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, ZhaoyangFeng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarellag, MARI, Stefano Maria, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, Aielli a, THE ARGO YBJ C. O. L. L. A. B. O. R. A. T. I. O. N. G., B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., DeVincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, C. F., Feng, Zhaoyangfeng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, J. Y., Li, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarellag, Mari, Stefano Maria, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, X. B., Qu, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, L., Xue, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, X. Y., Zhang, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g

Subjects
Physics, Nuclear and High Energy Physics, business.industry, Detector, Settore FIS/01 - Fisica Sperimentale, Detector control system, Extensive air showers, Gaseous detectors, Resistive plate chambers, Optics, business, Instrumentation, Argo, Remote sensing
Abstract

The ARGO-YBJ array for EAS detection at high altitude (4300 m a.s.l.) is the largest RPC-based detector in operation at present (active area of 6700 m 2 out of a total instrumented surface of about 10 4 m 2 ). The constant monitoring of the main operational and environmental parameters is essential for both keeping the detector status under control and understanding the detector behaviour more deeply. Exploiting the information provided by the ARGO-YBJ Detector Control System, the present status of the detector is described and some correlations between the environmental and the operational parameters of the ARGO-YBJ RPCs are shown. This study was performed using the monitored data from the complete ARGO-YBJ array which has been in operation since October 2007. Preliminary results on the observations of the Moon shadow and of γ -ray point sources are also presented.

Published
2009

36. Proton-air cross section measurement with the ARGO-YBJ cosmic ray experiment

Author

I. De Mitri, B. D'Ettorre Piazzoli, A. K. Calabrese Melcarne, P. Pistilli, H. M. Zhang, G. Marsella, X. X. Zhou, Enrico Rossi, Giovanni Mancarella, L. Xue, F. Galeazzi, P. Galeotti, C. Liu, Jilong Zhang, G. D'Alí Staiti, P. Vallania, A. Surdo, X. X. Li, Q. Huang, Giulio Aielli, Hong-peng Lu, X. H. Ma, Longzhou Zhang, Q. Q. Zhu, C. Bacci, G. Liguori, Haibing Hu, M. Y. Liu, A. Pagliaro, A. F. Yuan, Zhenyong Feng, Huaguang Wang, C. Bleve, Paolo Camarri, Y. Zhang, B. Bartoli, X. D. Sheng, Fudong Shi, Q. Y. Yang, N. Cheng, X. R. Meng, G. Zizzi, D. Martello, J. K. K. Liu, C. Cattaneo, J. Y. Li, R. Gargana, Danzengluobu, Labaciren, S. Mastroianni, R. Santonico, M. Iacovacci, Chang-Chun Ning, B. S. Wang, S. M. Mari, X. Y. Zhang, L. Perrone, Zhaxisangzhu, Zhaoyang Feng, Y. Q. Guo, Jianli Zhang, P. Creti, Zihuang Cao, F. Ruggieri, A. Cappa, Carlo Vigorito, Y. X. Yan, Antonio Budano, S. W. Cui, C. Y. Wu, Barbara Liberti, X. B. Qu, C. Q. Liu, X. C. Yang, P. Salvini, X. H. Ding, L. Saggese, P. F. Zhang, X. J. Bi, Irina James, Roberto Cardarelli, P. Bernardini, S. Z. Chen, Y. H. Tan, F. R. Zhu, Paolo Montini, R. Iuppa, S. Catalanotti, M. Panareo, G. Di Sciascio, T. Di Girolamo, P. Celio, H.H. He, M. Dattoli, M. De Vincenzi, Y. B. Chen, Hongbo Hu, C. F. Feng, H. Y. Jia, H. J. Li, S. Vernetto, H. R. Wu, P. R. Shen, M. Zha, B. Z. Dai, Cristian Stanescu, P. Branchini, Bingwei Xu, Severino Angelo Maria Bussino, Q. B. Gou, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, XJ, Bleve, C, Branchini, P, Budano, A, Bussino, S, Calabrese Melcarne, AK, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, SZ, Chen, Y, Cheng, N, Creti, P, Cui, SW, Dai, BZ, D'Ali'Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, XH, Di Sciascio, G, Feng, F, Feng, ZYa, Feng, ZYo, Galeazzi, F, Galeotti, P, Gargana, R, Gou, QB, Guo, YQ, He, HH, Hu, HaB, Hu, HoB, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, HY, Labaciren, Li, HJ, Li, JY, Li, XX, Liberti, B, Liguori, G, Liu, C, Liu, CQ, Liu, J, Liu, MY, Lu, H, Ma, XH, Mancarella, G, Mari, SM, Marsella, G, Martello, D, Mastroianni, S, Meng, XR, Montini, P, Ning, CC, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, XB, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, PR, Sheng, XD, Shi, F, Stanescu, C, Surdo, A, Tan, YH, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, CY, Wu, HR, Xu, B, Xue, L, Yan, YX, Yang, QY, Yang, XC, Yuan, AF, Zha, M, Zhang, HM, Zhang, JLi, Zhang, JLo, Zhang, L, Zhang, P, Zhang, XY, Zhang, Y, Zhaxisangzhu, Zhou, XX, Zhu, FR, Zhu, QQ, Zizzi, G, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, Bleve, Carla, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’Ali' Staiti, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, X. X., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, P., Montini, C. C., Ning, A., Pagliaro, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, Q. Y., Yang, X. C., Yang, A. F., Yuan, M., Zha, H. M., Zhang, Jilong, Zhang, Jianli, Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, Zizzi, Giovanni, Bi, Xj, Bussino, Severino Angelo Maria, Melcarne, Akc, Chen, Sz, Cui, Sw, Dai, Bz, Staiti, Gd, Piazzoli, Bd, Ding, Xh, Feng, Cf, Feng, Zy, Gou, Qb, Guo, Yq, He, Hh, Hu, Hb, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liu, Cq, Liu, My, Ma, Xh, Mari, Stefano Maria, Meng, Xr, Ning, Cc, Qu, Xb, Shen, Pr, Sheng, Xd, Tan, Yh, Wu, Cy, Wu, Hr, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zhang, Hm, Zhang, Jl, Zhang, Xy, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, B., D???Ettorre Piazzoli, DI GIROLAMO, Tristano, Iacovacci, Michele, and Collaborazione ARGO, Ybj

Subjects
Nuclear and High Energy Physics, Cosmic rays, Proton-air cross section, gamma astronomy, Proton, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Cosmic ray, Cross Section, 01 natural sciences, Cosmic Ray, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, Multiplicity (chemistry), 010306 general physics, Nuclear Experiment, Zenith, Argo, Physics, 010308 nuclear & particles physics, Attenuation, Detector, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, 3. Good health, Hadronic Interaction, High Energy Physics::Experiment, Extensive Air Showers
Abstract

The proton-air cross section in the energy range 1-100 TeV has been measured by the ARGO-YBJ cosmic ray experiment. The analysis is based on the flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits the detector capabilities of selecting the shower development stage by means of hit multiplicity, density and lateral profile measurements at ground. The effects of shower fluctuations, the contribution of heavier primaries and the uncertainties of the hadronic interaction models, have been taken into account. The results have been used to estimate the total proton-proton cross section at center of mass energies between 70 and 500 GeV, where no accelerator data are currently available., Comment: 14 pages, 9 figures

Published
2009

37. Software Timing Calibration of the ARGO-YBJ Detector

Author

A. Cappa, F. R. Zhu, L. Perrone, M. Panareo, P. Zhang, C. Y. Wu, P. Salvini, A. F. Yuan, L. Zhang, Q. Q. Zhu, X. R. Meng, Y.G. Wang, N. Cheng, P. Pistilli, C. Stanescu, Zhaoyang Feng, X. X. Zhou, S. Mastroianni, S. Catalanotti, H.T. Yang, Piero Vallania, C. Vigorito, L. Saggese, X. C. Yang, P. Galeotti, B. D'Ettorre Piazzoli, J. K. K. Liu, H. J. Li, H. R. Wu, A. Budano, Zhengguo Cao, H. Y. Jia, M. Iacovacci, M. Zha, R. Gargana, Labaciren, C. Bacci, C. Cattaneo, T. Di Girolamo, M. Dattoli, X. Y. Gao, L. Xue, P. Celio, G.C. Yu, Haoqi Lu, Zhaxisangzhu, I. James, Q. Huang, G. Di Sciascio, G. Cusumano, C. Pino, F. Shi, Danzengluobu, P. Creti, C.C. Ning, M. De Vincenzi, C. Liu, Sergio Cavaliere, Luciano Nicastro, A. K. Calabrese Melcarne, C. Ferrigno, A. Segreto, R. Cardarelli, Y. H. Zhang, G. Marsella, B. Liberti, G. Mancarella, B. Bartoli, P. Camarri, E. Rossi, X. Y. Zhang, H. W. Wang, S. W. Cui, Zhenyong Feng, Huihai He, S. Vernetto, F. Galeazzi, X. D. Sheng, Paolo Bernardini, Hongbo Hu, A. Surdo, C. F. Feng, R. Santonico, P. R. Shen, G. Aielli, Zhang Jingzhe, Bingwei Xu, Severino Angelo Maria Bussino, Q. B. Gou, J. Y. Li, I. De Mitri, L. Palummo, H. M. Zhang, Q. Y. Yang, G. D'Alí Staiti, G. Zizzi, S. M. Mari, J. Mu, X. J. Bi, S. Z. Chen, B. Z. Dai, F. Ruggieri, P. Branchini, X. B. Qu, X. H. Ding, Y. H. Tan, G. Liguori, Haibing Hu, C. Bleve, D. Martello, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Li, J., Li, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, C., Pino, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, AIELLI, G, BACCI, C, BARTOLI, B, BERNARDINI, P, BI, XJ, BLEVE, C, BRANCHINI, P, BUDANO, A, BUSSINO, S, CALABRESE MELCARNE, AK, CAMARRI, P, CAO, Z, CAPPA, A, CARDARELLI, R, CATALANOTTI, S, CATTANEO, C, CAVALIERE, S, CELIO, P, CHEN, SZ, CHENG, N, CRETI, P, CUI, SW, CUSUMANO, G, DAI, BZ, D'ALI'STAITI, G, DANZENGLUOBU, DATTOLI, M, DE MITRI, I, DETTORRE PIAZZOLI, B, DE VINCENZI, M, DI GIROLAMO, T, DING, XH, DI SCIASCIO, G, FENG, CF, FENG, ZHAOYANG, FENG, ZHENYONG, FERRIGNO, C, GALEAZZI, F, GALEOTTI, P, GAO, XY, GARGANA, R, GOU, QB, HE, HH, HU, HAIBING, HU, HONGBO, HUANG, Q, IACOVACCI, M, JAMES, I, JIA, HY, LABACIREN, LI, HJ, LI, JY, LIBERTI, B, LIGUORI, G, LIU, CQ, LIU, J, LU, H, MANCARELLA, G, MARI, SM, MARSELLA, G, MARTELLO, D, MASTROIANNI, S, MENG, XR, MU, J, NICASTRO, L, NING, CC, PALUMMO, L, PANAREO, M, PERRONE, L, PINO, C, PISTILLI, P, QU, XB, ROSSI, E, RUGGIERI, F, SAGGESE, L, SALVINI, P, SANTONICO, R, SEGRETO, A, SHEN, PR, SHENG, XD, SHI, F, STANESCU, C, SURDO, A, TAN, YH, VALLANIA, P, VERNETTO, S, VIGORITO, C, WANG, H, WANG, YG, WU, CY, WU, HR, XU, B, XUE, L, YANG, HT, YANG, QY, YANG, XC, YU, GC, YUAN, AF, ZHA, M, ZHANG, HM, ZHANG, JL, ZHANG, L, ZHANG, P, ZHANG, XY, ZHANG, Y, ZHAXISANGZHU, ZHOU, XX, ZHU, FR, ZHU, QQ, G ZIZZI, g, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Melcarne, Akc, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Cavaliere, S, Celio, P, Chen, Sz, Cheng, N, Creti, P, Cui, Sw, Cusumano, G, Dai, Bz, Staiti, Gd, Dattoli, M, De Mitri, I, Piazzoli, Bd, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng, Zy, Ferrigno, C, Galeazzi, F, Galeotti, P, Gao, Xy, Gargana, R, Gou, Qb, He, Hh, Hu, Hb, Huang, Q, Iacovacci, M, James, I, Jia, Hy, Li, Hj, Li, Jy, Liberti, B, Liguori, G, Liu, Cq, Liu, J, Lu, H, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Mu, J, Nicastro, L, Ning, Cc, Palummo, L, Panareo, M, Perrone, L, Pino, C, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Segreto, A, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, H, Wang, Yg, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yang, Ht, Yang, Qy, Yang, Xc, Yu, Gc, Yuan, Af, Zha, M, Zhang, Hm, Zhang, Jl, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, Cavaliere, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, and Iacovacci, Michele

Subjects
Physics, Pixel, Calibration (statistics), business.industry, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Settore FIS/01 - Fisica Sperimentale, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Astronomia gamma, Gamma Astronomy, Timing Calibration, Extensive Air Showers, Sciami estesi, Calibrazione temporale, Optics, Software, Raggi cosmici, Settore FIS/05 - Astronomia e Astrofisica, Angular resolution, business, Argo, Remote sensing
Abstract

The ARGO-YBJ experiment is mainly devoted to search for astronomical gamma sources. The arrival direction of air showers is reconstructed thanks to the times measured by the pixels of the detector. Therefore, the timing calibration of the detector pixels is crucial in order to get the best angular resolution and pointing accuracy. Because of the large number of pixels a hardware timing calibration is practically impossible. Therefore an off-line software calibration has been adopted. Here, the details of the procedure and the results are presented. (C) 2008 Elsevier B.V. All rights reserved.

Published
2009

38. Results and overview from the ARGO-YBJ experiment

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, B. Z. Dai, G. D’Alì Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D’Alì Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., Bartoli, Bruno, Catalanotti, Sergio, D'ETTORRE PIAZZOLI, Benedetto, DI GIROLAMO, Tristano, and Iacovacci, Michele

Subjects
Physics, Nuclear and High Energy Physics, Extensive air shower, Astronomy, Cosmic ray, Astrophysics, Extensive Air Showers, Gamma Astronomy, Array Detector, Cosmic Ray, Atomic and Molecular Physics, and Optics, Argo, Argo-Ybj
Abstract

Within a Collaboration Agreement between INFN and CAS (Chinese Academy of Science), the ARGO-YBJ experiment is completely installed and has been in stable data taking since November 2007 at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l.). In this paper we report a few selected results in γ -ray Astronomy and Cosmic Ray Physics.

Published
2009

39. Results from the ARGO-YBJ experiment

Author

THE ARGO YBJ C.O.L.L.A.B.O.R.A.T.I.O.N.G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, Aielli a, THE ARGO YBJ C. O. L. L. A. B. O. R. A. T. I. O. N. G., B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, C. F., Feng, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, J. Y., Li, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, Mari, Stefano Maria, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, X. B., Qu, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, L., Xue, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, X. Y., Zhang, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g

Abstract

The ARGO-YBJ detector at the YangBaJing Cosmic Ray Observatory (4300 m a.s.l., Tibet, P.R. China) has been put into operation in the full congration since November 2007. It is the rst EAS detector combining a very high mountain altitude with a full coverage detection surface. The high time-space granularity combined with the full coverage make ARGO-YBJ a unique device to study the EAS characteristics. In this paper we report a few selected results in Gamma-Ray Astronomy and Cosmic Ray Physics

Published
2009

40. Gamma Ray Astronomy with the ARGO-YBJ

Author

THE ARGO YBJ C.O.L.L.A.B.O.R.A.T.I.O.N.G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. De Vincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, Zhaoyang Feng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarella g, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, Aielli a, THE ARGO YBJ C. O. L. L. A. B. O. R. A. T. I. O. N. G., B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., De Vincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, C. F., Feng, Zhaoyang Feng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, J. Y., Li, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarella g, Mari, Stefano Maria, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, X. B., Qu, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, L., Xue, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, X. Y., Zhang, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, and G., Zizzi g

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics
Abstract

ARGO-YBJ is the first EAS detector combining a very high mountain altitude (4300 m a.s.l.) to a "full coverage" detection surface. These features allow ARGO-YBJ to work with an energy threshold as low as a few hundreds GeV. The high duty cycle and the large field of view (~2 sr) make ARGO-YBJ suitable to monitor the gamma ray sky searching for unknown sources and unexpected events, like Active Galactic Nuclei flaring episodes or high energy Gamma Ray Bursts. In this paper we present the first observations of ARGO-YBJ concerning gamma ray astronomy, in particular the detection of the Crab Nebula and the blazar Markarian 421 during the 2006 and 2008 outbursts, and the results of a search for Gamma Ray Bursts emission in the GeV energy range using the scaler mode technique.

Published
2009

41. ARGO-YBJ constraints on very high energy emission from GRBs

Author

G. Aielli, C. Bacci, B. Bartoli, X. J. Bi, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, P. Celio, S. Z. Chen, Y. Chen, N. Cheng, P. Creti, S. W. Cui, B. Z. Dai, G. D'Ali' Staiti, Danzengluobu, M. Dattoli, B. D'Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, Q. B. Gou, Y. Q. Guo, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, R. Iuppa, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, X. X. Li, Y. R. Li, B. Liberti, G. Liguori, C. Liu, C. Q. Liu, M. Y. Liu, J. Liu, H. Lu, X. H. Ma, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, B. Wang, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, Y. X. Yan, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, BERNARDINI, Paolo, BLEVE, Carla, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, ZIZZI, GIOVANNI, G., Aielli, C., Bacci, B., Bartoli, Bernardini, Paolo, X. J., Bi, Bleve, Carla, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, P., Celio, S. Z., Chen, Y., Chen, N., Cheng, P., Creti, S. W., Cui, B. Z., Dai, G., D'Ali' Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, B., D'Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, Q. B., Gou, Y. Q., Guo, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, R., Iuppa, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, X. X., Li, Y. R., Li, B., Liberti, G., Liguori, C., Liu, C. Q., Liu, M. Y., Liu, J., Liu, H., Lu, X. H., Ma, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, B., Wang, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, Y. X., Yan, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and Zizzi, Giovanni

Subjects
Gamma ray burst, Extensive air shower, Cosmic rays, Gamma-ray
Abstract

The ARGO-YBJ experiment is designed for very high energy gamma-astronomy and cosmic ray researches. Due to the full coverage of a large area (5600 m^2) with resistive plate chambers at a very high altitude (4300 m a.s.l.), the ARGO-YBJ detector is used to search for transient phenomena, such as gamma-ray bursts (GRBs). Because the ARGO-YBJ detector has a large field of view ( about 2 sr) and is operated with a high duty cycle (>90%), it is one of the best ground-based GRB surveying apparatuses. Working at a relatively high energy threshold around a few hundreds of GeV, the ARGO-YBJ detector is operated in searches for high energy GRBs following alarms set by satellite-borne observations at lower energies. In this paper, the sensitivity of the ARGO-YBJ detector for GRB detection is estimated. Upper limits to fluence with 99% confidence level for 30 GRBs inside the field of view from June 2006 to January 2009 are set in the two energy ranges 10 GeV - 100 GeV and 10 GeV-1 TeV.

Published
2009

42. Progress Report on the TIBET AS+MD Project

Author

M. Takita, A. F. Yuan, Takashi Saito, Huaguang Wang, T. K. Sako, Labaciren, K. Kawata, M. Sakata, Masaki Nishizawa, M. Ohnishi, S. Yasue, K. Mizutani, Gui-Ming Le, Takeshi Saito, S. Udo, Q. B. Gou, X. J. Bi, Z. T. He, H. Nanjo, K. Hibino, Ang Li, T. Shirai, N. Hotta, Y. Yamamoto, T. L. Chen, L. M. Zhai, X. B. Qu, F. Kajino, H. B. Hu, Masayoshi Kozai, M. Shibata, C. F. Feng, Hsiao-Chi Lu, L. L. Jiang, Zhaxisangzhu, Y. Katayose, I. Ohta, K. Kasahara, Donghong Chen, Chihiro Kato, H. H. He, Jing Huang, Yi Zhang, C. X. Liu, N. Tateyama, Harufumi Tsuchiya, J. S. Liu, S. Ozawa, Haibing Hu, L. K. Ding, Ying Zhang, Z. Y. Feng, M. Amenomori, S. W. Cui, Danzengluobu, Y. Q. Guo, W. Y. Chen, H. J. Li, Zicai Yang, H. R. Wu, W. J. Li, X. L. Qian, Y. Zhang, Jia Zhang, S. Torii, A. Shiomi, X. Y. Zhang, Minghui Liu, L. Xue, Y. H. Tan, Kazuoki Munakata, H. M. Zhang, X. X. Zhou, H. Sugimoto, X. R. Meng, Zhaoyang Feng, J. Shao, T. Yuda, and H. Y. Jia

Subjects
Thesaurus (information retrieval), Engineering, business.industry, Library science, business
Abstract

M. Amenomori1, X. J. Bi2, D. Chen3, T. L. Chen4, W. Y. Chen2, S. W. Cui5, Danzengluobu4, L. K. Ding2, C. F. Feng6, Zhaoyang Feng2, Z. Y. Feng7, Q. B. Gou2, Y. Q. Guo2, H. H. He2, Z. T. He5, K. Hibino8, N. Hotta9, Haibing Hu4, H. B. Hu2, J. Huang2, H. Y. Jia7, L. Jiang2, F. Kajino10, K. Kasahara11, Y. Katayose12, C. Kato13, K. Kawata14, M. Kozai13, Labaciren4, G. M. Le2, A. F. Li15,6,2, H. J. Li4, W. J. Li2,7, C. Liu2, J. S. Liu2, M. Y. Liu4, H. Lu2, X. R. Meng4, K. Mizutani11,16, K. Munakata13, H. Nanjo1, M. Nishizawa17, M. Ohnishi14, I. Ohta18, S. Ozawa11, X. L. Qian6,2, X. B. Qu19,2, T. Saito20, T. Y. Saito21, M. Sakata10, T. K. Sako14, J. Shao2,6, M. Shibata12, A. Shiomi22, T. Shirai8, H. Sugimoto23, M. Takita14, Y. H. Tan2, N. Tateyama8, S. Torii11, H. Tsuchiya24, S. Udo8, H. Wang2, H. R. Wu2, L. Xue6, Y. Yamamoto10, Z. Yang2, S. Yasue25, A. F. Yuan4, T. Yuda14, L. M. Zhai2, H. M. Zhang2, J. L. Zhang2, X. Y. Zhang6, Y. Zhang2, Yi Zhang2, Ying Zhang2, Zhaxisangzhu4, X. X. Zhou7 (The Tibet ASγ Collaboration)

Published
2014

43. Simulation study of air shower particles near the core region

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Physics, Nuclear and High Energy Physics, Shower array detector, Particle number, shower core, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Cosmic ray, Signal, extensive air shower, Atomic and Molecular Physics, and Optics, Computational physics, Argo-Ybj, Core (optical fiber), Nuclear physics, detector array, Analog signal, Air shower, Energy (signal processing)
Abstract

The ARGO-YBJ experiment has two kinds of signals in the shower working mode which allows coverage of the energy region from TeV to PeV region. One is the digital strip pattern, another is so-called ‘big pad’ mode, which is the analog signal counting the pulse height on half of an RPC, proportional to the number of hitting particles. In this paper by using the Monte Carlo simulation method the ARGO-YBJ sensitivity to the cosmic ray composition is discussed, by using the ‘big pad’ signal for measuring the number of particles detected close to the shower core.

Published
2008

44. Search for gamma ray bursts with the ARGO-YBJ detector in scaler mode

Author

THE ARGO YBJ C.O.L.L.A.B.O.R.A.T.I.O.N.G. Aielli a, b, C. Bacci c, d, B. Bartoli e, f, P. Bernardini g, h, X. J. Bi i, C. Bleve g, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne x, P. Camarri a, Z. Cao i, A. Cappa j, k, R. Cardarelli b, S. Catalanotti f, e, C. Cattaneo l, P. Celio c, S. Z. Chen i, Y. Chen i, N. Cheng i, P. Creti h, S. W. Cuim, B. Z. Dai o, G. D’Alí Staiti n, p, Danzengluobu q, M. Dattoli j, k, r, I. De Mitri g, B. D’Ettorre Piazzoli f, M. DeVincenzi c, T. Di Girolamo f, X. H. Ding q, G. Di Sciascio b, C. F. Feng s, ZhaoyangFeng i, Zhenyong Feng t, F. Galeazzi d, P. Galeotti j, r, R. Gargana d, Q. B. Gou i, Y. Q. Guo i, H. H. He i, Haibing Huq, Hongbo Hui, Q. Huang t, M. Iacovacci f, R. Iuppa a, I. James c, H. Y. Jia t, Labaciren q, H. J. Li q, J. Y. Li s, X. X. Li i, B. Liberti b, G. Liguori l, u, C. Liu i, C. Q. Liu o, M. Y. Lium, J. Liu o, H. Lui, X. H. Mai, G. Mancarellag, c, d, G. Marsella h, v, D. Martello g, S. Mastroianni e, X. R. Meng q, P. Montini c, C. C. Ning q, A. Pagliaro n, w, M. Panareo h, L. Perrone h, P. Pistilli c, X. B. Qu s, E. Rossi e, F. Ruggieri d, L. Saggese f, P. Salvini l, R. Santonico a, P. R. Shen i, X. D. Sheng i, F. Shi i, C. Stanescu d, A. Surdo h, Y. H. Tan i, P. Vallania j, S. Vernetto j, C. Vigorito j, B. Wangi, H. Wang i, C. Y. Wui, H. R. Wui, B. Xut, L. Xues, Y. X. Yanm, Q. Y. Yang o, X. C. Yang o, A. F. Yuan q, M. Zha i, H. M. Zhang i, JiLong Zhang i, JianLi Zhang i, L. Zhang o, P. Zhang o, X. Y. Zhang s, Y. Zhang i, Zhaxisangzhu q, X. X. Zhou t, F. R. Zhu i, Q. Q. Zhu i, G. Zizzi g, MARI, Stefano Maria, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli a, THE ARGO YBJ C. O. L. L. A. B. O. R. A. T. I. O. N. G., B, C., Bacci c, D, B., Bartoli e, F, P., Bernardini g, H, X. J., Bi i, C., Bleve g, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne x, P., Camarri a, Z., Cao i, A., Cappa j, K, R., Cardarelli b, S., Catalanotti f, E, C., Cattaneo l, P., Celio c, S. Z., Chen i, Y., Chen i, N., Cheng i, P., Creti h, S. W., Cuim, B. Z., Dai o, G., D’Alí Staiti n, P, Danzengluobu, Q, M., Dattoli j, K, R, I., De Mitri g, B., D’Ettorre Piazzoli f, M., DeVincenzi c, T., Di Girolamo f, X. H., Ding q, G., Di Sciascio b, Zhaoyangfeng, I, Zhenyong Feng, T, F., Galeazzi d, P., Galeotti j, R, R., Gargana d, Q. B., Gou i, Y. Q., Guo i, H. H., He i, Haibing, Huq, Hongbo, Hui, Q., Huang t, M., Iacovacci f, R., Iuppa a, I., James c, H. Y., Jia t, Labaciren, Q, H. J., Li q, X. X., Li i, B., Liberti b, G., Liguori l, U, C., Liu i, C. Q., Liu o, M. Y., Lium, J., Liu o, H., Lui, X. H., Mai, G., Mancarellag, C, D, G., Marsella h, V, D., Martello g, S., Mastroianni e, X. R., Meng q, P., Montini c, C. C., Ning q, A., Pagliaro n, W, M., Panareo h, L., Perrone h, P., Pistilli c, E., Rossi e, F., Ruggieri d, L., Saggese f, P., Salvini l, R., Santonico a, P. R., Shen i, X. D., Sheng i, F., Shi i, C., Stanescu d, A., Surdo h, Y. H., Tan i, P., Vallania j, S., Vernetto j, C., Vigorito j, B., Wangi, H., Wang i, C. Y., Wui, H. R., Wui, B., Xut, Y. X., Yanm, Q. Y., Yang o, X. C., Yang o, A. F., Yuan q, M., Zha i, H. M., Zhang i, JiLong Zhang, I, JianLi Zhang, I, L., Zhang o, P., Zhang o, Y., Zhang i, Zhaxisangzhu, Q, X. X., Zhou t, F. R., Zhu i, Q. Q., Zhu i, G., Zizzi g, Barone, F, Melcarne, Akc, Cavaliere, S, Staiti, Gd, De Rosa, R, Piazzoli, Bd, DE VINCENZI, Mario, Feng, Zy, Gao, Xy, Garufi, F, Hu, Hb, Mu, J, Palummo, L, Segreto, A, Wang, Yg, Yang, Ht, Yu, Gc, Zhang, Jl, Bleve, Carla, CALABRESE MELCARNE, ANNA KAREN, G., D’Alì Staiti, Y. Q., Guo, R., Iuppa, Zizzi, Giovanni, DI GIROLAMO, Tristano, Aielli, G., Bacci, C., Barone, F., Bartoli, Bruno, Bernardini, P., Bleve, C., Branchini, P., Budano, A., Bussino, S., Calabrese Melcarne, A. K., Camarri, P., Cao, Z., Cappa, A., Cardarelli, R., Catalanotti, Sergio, Cattaneo, C., Cavaliere, Sergio, Celio, P., Chen, S. Z., Cheng, N., Creti, P., Cui, S. W., Dai, B. Z., D'Alì Staiti, G., Dattoli, M., De Mitri, I., DE ROSA, Rosario, D'ETTORRE PIAZZOLI, Benedetto, De Vincenzi, M., Ding, X. H., Di Sciascio, G., Feng, C. F., Galeazzi, F., Galeotti, P., Gao, X. Y., Gargana, R., Garufi, Fabio, Gou, Q. B., Guo, Y. Q., Huang, Q., Iacovacci, Michele, Iuppa, R., James, I., Jia, H. Y., Liberti, B., Liguori, G., Liu, C. Q., Liu, J., Lu, H., Mancarella, G., Mari, S. M., Marsella, G., Martello, D., Mastroianni, S., Meng, X. R., Mu, J., Ning, C. C., Palummo, L., Panareo, M., Perrone, L., Pistilli, P., Rossi, E., Ruggieri, F., Saggese, L., Salvini, P., Santonico, R., Segreto, A., Shen, P. R., Sheng, X. D., Shi, F., Stanescu, C., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, H., Wang, Y. G., Xu, B., Xue, L., Yang, H. T., Yang, Q. Y., Yang, X. C., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhou, X. X., Zhu, F. R., Zhu, Q. Q., AIELLI, G, BACCI, C, BARONE, F, BARTOLI, B, BERNARDINI, P, BI, XJ, BLEVE, C, BRANCHINI, P, BUDANO, A, BUSSINO, S, CALABRESE MELCARNE, AK, CAMARRI, P, CAO, Z, CAPPA, A, CARDARELLI, R, CATALANOTTI, S, CATTANEO, C, CAVALIERE, S, CELIO, P, CHEN, SZ, CHENG, N, CRETI, P, CUI, SW, DAI, BZ, D'ALI'STAITI, G, DANZENGLUOBU, DATTOLI, M, DE MITRI, I, DE ROSA, R, DETTORRE PIAZZOLI, B, DE VINCENZI, M, DI GIROLAMO, T, DING, XH, DI SCIASCIO, G, FENG, CF, FENG, ZHAOYANG, FENG, ZHENYONG, GALEAZZI, F, GALEOTTI, P, GAO, XY, GARGANA, R, GARUFI, F, GOU, QB, GUO, YQ, HE, HH, HU, HAIBING, HU, HONGBO, HUANG, Q, IACOVACCI, M, IUPPA, R, JAMES, I, JIA, HY, LABACIREN, LI, HJ, LI, JY, LIBERTI, B, LIGUORI, G, LIU, CQ, LIU, J, LU, H, MANCARELLA, G, MARI, SM, MARSELLA, G, MARTELLO, D, MASTROIANNI, S, MENG, XR, MU, J, NING, CC, PALUMMO, L, PANAREO, M, PERRONE, L, PISTILLI, P, QU, XB, ROSSI, E, RUGGIERI, F, SAGGESE, L, SALVINI, P, SANTONICO, R, SEGRETO, A, SHEN, PR, SHENG, XD, SHI, F, STANESCU, C, SURDO, A, TAN, YH, VALLANIA, P, VERNETTO, S, VIGORITO, C, WANG, H, WANG, YG, WU, CY, WU, HR, XU, B, XUE, L, YANG, HT, YANG, QY, YANG, XC, YU, GC, YUAN, AF, ZHA, M, ZHANG, HM, ZHANG, JL, ZHANG, L, ZHANG, P, ZHANG, XY, ZHANG, Y, ZHAXISANGZHU, ZHOU, XX, ZHU, FR, ZHU, QQ, and ZIZZI, G

Subjects
Nuclear and High Energy Physics, Gamma ray burst, Astrophysics::High Energy Astrophysical Phenomena, Air shower array, Astrophysics, Argo-Ybj, Settore FIS/05 - Astronomia e Astrofisica, Observatory, Gamma Rays Observations, Instrumentation, Zenith, Argo, Physics, Range (particle radiation), Apparati di sciame, Detector, Settore FIS/01 - Fisica Sperimentale, Gamma ray, Gamma ray bursts, Air shower arrays, Mode (statistics), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Redshift, Air shower, Space and Planetary Science, Gamma Ray Bursts, Gamma Ray Emission, Astrophysics - High Energy Astrophysical Phenomena, Gamma-ray burst
Abstract

We report on the search for Gamma Ray Bursts (GRBs) in the energy range 1-100 GeV in coincidence with the prompt emission detected by satellites using the Astrophysical Radiation with Ground-based Observatory at YangBaJing (ARGO-YBJ) air shower detector. Thanks to its mountain location (Yangbajing, Tibet, P.R. China, 4300 m a.s.l.), active surface (about 6700 m**2 of Resistive Plate Chambers), and large field of view (about 2 sr, limited only by the atmospheric absorption), the ARGO-YBJ air shower detector is particularly suitable for the detection of unpredictable and short duration events such as GRBs. The search is carried out using the "single particle technique", i.e. counting all the particles hitting the detector without measurement of the energy and arrival direction of the primary gamma rays. Between 2004 December 17 and 2009 April 7, 81 GRBs detected by satellites occurred within the field of view of ARGO-YBJ (zenith angle < 45 deg). It was possible to examine 62 of these for >1 GeV counterpart in the ARGO-YBJ data finding no statistically significant emission. With a lack of detected spectra in this energy range fluence upper limits are profitable, especially when the redshift is known and the correction for the extragalactic absorption can be considered. The obtained fluence upper limits reach values as low as 10**{-5} erg cm**{-2} in the 1-100 GeV energy region. Besides this individual search for a higher energy counterpart, a statistical study of the stack of all the GRBs both in time and in phase was made, looking for a common feature in the GRB high energy emission. No significant signal has been detected., Comment: accepted for publication in ApJ

Published
2008

45. Characteristic Plane Method with Conical Correction

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Physics, Nuclear and High Energy Physics, Timing Calibration, business.industry, Plane (geometry), Astrophysics::High Energy Astrophysical Phenomena, Detector, Monte Carlo method, Astrophysics::Instrumentation and Methods for Astrophysics, Extensive Air Shower, Conical surface, Cosmic Ray, Characteristic Plane Method, Atomic and Molecular Physics, and Optics, Argo-Ybj, Planar, Optics, Position (vector), Detector Array, Calibration, Angular resolution, business, Physics::Atmospheric and Oceanic Physics
Abstract

In ground-based cosmic ray experiments, the equalization of the transit time of signals coming from different parts of the apparatus is of crucial importance for the improvement of the angular resolution and accuracy. In the ARGO-YBJ experiment, this is achieved using the Characteristic Plane Method with conical correction, studied by both Monte Carlo simulation and real data and also checked with manual absolute calibration on a portion of the detector. By introducing conical correction in primary direction reconstruction, the systematics error existing in the off-line calibration with planar fit is successfully removed. Two subsequent construction phases of the detector have been considered: ARGO-42 and ARGO-104. During the calibration of ARGO-104, events with more than 1000 hits and with the core reconstructed inside the carpet were used in order to achieve a good reconstruction of the shower, that is the arrival direction and the core position. The results of the calibration concerning the two configurations, ARGO-42 and ARGO-104, are compared and discussed.

Published
2008

46. Status of ARGO-YBJ: an overview

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, and G., Zizzi

Subjects
Physics, Gamma ray Astronomy, Nuclear and High Energy Physics, Resistive touchscreen, Gamma Astronomy, Trigger rate, Detector, Cosmic ray, Extensive Air Shower, Gamma-ray astronomy, Atomic and Molecular Physics, and Optics, Argo-Ybj, Nuclear physics, Detector Array, Argo
Abstract

Within a Collaboration Agreement between INFN and CAS (Chinese Academy of Science), the ARGO-YBJ experiment is completely installed at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China). ARGO-YBJ is a plane detector, with a total detection area of ∼ 6500 m 2 , made of Resistive Plate Chambers (RPCs) which provide a detailed space-time picture of the charged component of the extensive air showers. At present the detector is completely mounted and the central carpet of 5800 m 2 is operating under a multiplicity trigger N p a d ⩾ 20 , the trigger rate is about 3.5kHz and the data flow is 5MB/s. A 0.5 cm lead converter will be mounted on the detector in summer 2007.

Published
2008

47. Simulation of the ARGO-YBJ experiment operated in Scaler Mode

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, G. Zizzi, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, Danzengluobu, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, G., Zizzi, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Mari, Stefano Maria, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhou, Xx, Zhu, Fr, Zhu, Qq, and Zizzi, G.

Subjects
Physics, Nuclear and High Energy Physics, array detector, Photon, Proton, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Antenna aperture, Detector, chemistry.chemical_element, scaler mode, Cosmic ray, Atomic and Molecular Physics, and Optics, Spectral line, Computational physics, Argo-Ybj, gamma ray burst, Optics, chemistry, Extended air shower, business, Gamma-ray burst, Energy (signal processing), Helium
Abstract

The ARGO-YBJ experiment is a large area full coverage detector operating at high mountain altitude (4300 m a.s.l., Tibet, China, ∼6700 m2 active surface). In scaler mode, the particle rate is recorded at fixed time intervals (0.5 s), allowing the achievement of an energy threshold as low as E t h ∼ 1 GeV for the photons. This result, together with the estimate of the effective area as a function of the primary energy, has been obtained using the simulation code CORSIKA6201 for the shower development in the atmosphere and a dedicated and detailed detector simulation, ARGOG, based on GEANT3.21. With this simulation chain, and using the known primary proton and helium spectra, we obtained counting rates consistent with the measured ones, making us confident in the expectation of the detector performance as far as the photon shower detection is concerned, which is of crucial importance to determine the capability of the ARGO-YBJ experiment to detect gamma-ray bursts (GRBs).

Published
2008

48. ARGO-YBJ experiment and the Tev gamma astronomy

Author

The Argo YBJ Collaboration: G. Aielli a, b, C. Bacci c, d, F. Barone e, f, B. Bartoli g, P. Bernardini h, i, X. J. Bi j, C. Bleve h, i, 1, P. Branchini d, A. Budano d, S. Bussino c, A. K. Calabrese Melcarne h, P. Camarri a, Z. Cao j, A. Cappa k, l, R. Cardarelli b, S. Catalanotti g, C. Cattaneo m, S. Cavaliere g, P. Celio c, S. Z. Chen j, N. Cheng j, P. Creti i, S. W. Cui n, G. Cusumano o, p, B. Z. Dai q, G. D’Alí Staiti p, r, Danzengluobu s, M. Dattoli k, l, t, I. De Mitri h, R. De Rosa g, B. D’Ettorre Piazzoli g, M. De Vincenzi c, T. Di Girolamo g, X. H. Ding s, G. Di Sciascio f, C. F. Feng u, Zhaoyang Feng j, Zhenyong Feng v, C. Ferrigno o, F. Galeazzi d, P. Galeotti k, t, X. Y. Gao q. R. Gargana d, F. Garufi g, Q. B. Gou j, H. H. He j, Haibing Hu s, Hongbo Hu j, Q. Huang v, M. Iacovacci g, I. James m, w, H. Y. Jia v, Labaciren s, H. J. Li s, J. Y. Li u, B. Liberti b, G. Liguori m, C. Q. Liu q, J. Liu q, H. Lu j, G. Mancarella h, c, d, G. Marsella i, x, D. Martello h, S. Mastroianni c, X. R. Meng s, J. Mu q, L. Nicastro p, y, C. C. Ning s, L. Palummo a, M. Panareo i, L. Perrone i, P. Pistilli c, X. B. Qu u, E. Rossi f, F. Ruggieri d, L. Saggese g, P. Salvini m, R. Santonico a, A. Segreto o, P. R. Shen j, X. D. Sheng j, F. Shi j, C. Stanescu d, A. Surdo i, Y. H. Tan j, P. Vallania k, S. Vernetto k, C. Vigorito k, H. Wang j, Y. G. Wang j, C. Y. Wu j, H. R. Wu j, B. Xu v, L. Xue u, H. T. Yang q, Q. Y. Yang q, X. C. Yang q, G. C. Yu v, A. F. Yuan s, M. Zha j, H. M. Zhang j, J. L. Zhang j, L. Zhang q, P. Zhang q, X. Y. Zhang u, Y. Zhang j, Zhaxisangzhu s, X. X. Zhou v, F. R. Zhu j, Q. Q. Zhu j, G. Zizzi h, MARI, Stefano Maria, The Argo YBJ Collaboration: G., Aielli a, B, C., Bacci c, D, F., Barone e, F, B., Bartoli g, P., Bernardini h, I, X. J., Bi j, C., Bleve h, I, 1, P., Branchini d, A., Budano d, S., Bussino c, A. K., Calabrese Melcarne h, P., Camarri a, Z., Cao j, A., Cappa k, L, R., Cardarelli b, S., Catalanotti g, C., Cattaneo m, S., Cavaliere g, P., Celio c, S. Z., Chen j, N., Cheng j, P., Creti i, S. W., Cui n, G., Cusumano o, P, B. Z., Dai q, G., D’Alí Staiti p, R, Danzengluobu, S, M., Dattoli k, L, T, I., De Mitri h, R., De Rosa g, B., D’Ettorre Piazzoli g, M., De Vincenzi c, T., Di Girolamo g, X. H., Ding, G., Di Sciascio f, C. F., Feng u, Zhaoyang Feng, J, Zhenyong Feng, V, C., Ferrigno o, F., Galeazzi d, P., Galeotti k, T, X. Y. Gao q. R., Gargana d, F., Garufi g, Q. B., Gou j, H. H., He j, Haibing Hu, S, Hongbo Hu, J, Q., Huang v, M., Iacovacci g, I., James m, W, H. Y., Jia v, Labaciren, S, H. J., Li, J. Y., Li u, B., Liberti b, G., Liguori m, C. Q., Liu q, J., Liu q, H., Lu j, G., Mancarella h, Mari, Stefano Maria, C, D, G., Marsella i, X, D., Martello h, S., Mastroianni c, X. R., Meng, J., Mu q, L., Nicastro p, Y, C. C., Ning, L., Palummo a, M., Panareo i, L., Perrone i, P., Pistilli c, X. B., Qu u, E., Rossi f, F., Ruggieri d, L., Saggese g, P., Salvini m, R., Santonico a, A., Segreto o, P. R., Shen j, X. D., Sheng j, F., Shi j, C., Stanescu d, A., Surdo i, Y. H., Tan j, P., Vallania k, S., Vernetto k, C., Vigorito k, H., Wang j, Y. G., Wang j, C. Y., Wu j, H. R., Wu j, B., Xu v, L., Xue u, H. T., Yang q, Q. Y., Yang q, X. C., Yang q, G. C., Yu v, A. F., Yuan, M., Zha j, H. M., Zhang j, J. L., Zhang j, L., Zhang q, P., Zhang q, X. Y., Zhang u, Y., Zhang j, Zhaxisangzhu, S, X. X., Zhou v, F. R., Zhu j, Q. Q., Zhu j, G., Zizzi h, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., and Bernardini, Paolo

Subjects
Physics, Gamma ray Astronomy, Nuclear and High Energy Physics, Range (particle radiation), Photon, Physics::Instrumentation and Detectors, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Gamma-ray astronomy, Astrophysics, Declination, Atomic and Molecular Physics, and Optics, Astronomia gamma, Argo-Ybj, Sciami estesi, Air shower, Raggi cosmici, Sky, Extensive Air shower, Ultra-high-energy cosmic ray, media_common
Abstract

The ARGO-YBJ detector is an extensive air shower array consisting of a carpet of Resistive Plate Chambers (RPCs). Very high energy (VHE) gamma ray astronomy is the main scientific goal of this Chinese-Italian experiment. High altitude and full coverage ensure a low energy threshold (few hundreds of GeV for primary photons), high duty-cycle and large field of view allow a continuous sky survey in the declination range from −10° to +70°. Also many features of the high energy cosmic rays are studied by ARGO-YBJ exploiting the unprecented shower reconstruction.

Published
2007

49. The status of the ARGO experiment at YBJ

Author

G. AIELLI, C. BACCI, B. BARTOLI, P. BERNARDINI, X. J. BI, C. BLEVE, BUSSINO, Severino Angelo Maria, A. K. CALABRESE MELCARNE, P. CAMARRI, D. CAMPANA, Z. CAO, R. CARDARELLI, S. CATALANOTTI, S. CAVALIERE, P. CELIO, S. Z. CHEN, N. CHENG, P. CRETI, S. W. CUI, G. CUSUMANO, B. Z. DAI, DANZENGLUOBU, X. H. DING, G. D'ALI STAITI, B. D'ETTORRE PIAZZOLI, E. DE MARINIS, I. DE MITRI, T. DI GIROLAMO, G. DI SCIASCIO, C. F. FENG, ZHAO YANG FENG, ZHEN YONG FENG, C. FERRIGNO, X. Y. GAO, Q. B. GOU, H. H. HE, HONG BO HU, HAI BING HU, Q. HUANG, M. IACOVACCI, I. JAMES, H. Y. JIA, LABACIREN, J. Y. LI, H. J. LI, B. LIBERTI, G. LIGOURI, C. Q. LIU, J. LIU, H. LU, G. MANCARELLA, MARI, Stefano Maria, G. MARSELLA, D. MARTELLO, S. MASTROIANNI, X. R. MENG, J. MU, L. NICASTRO, C. C. NING, L. PALUMMO, M. PANAREO, L. PERRONE, P. PISTILLI, X. B. QU, E. REALI, E. ROSSI, B. SACCO, L. SAGGESE, P. SALVINI, A. SEGRETO, R. SANTONICO, P. R. SHEN, X. D. SHENG, F. SHI, C. STANESCU, A. SURDO, Y. H. TAN, P. VALLANIA, S. VERNETTO, H. WANG, Y. G. WANG, C. Y. WU, B. XU, L. XUE, H. T. YANG, Q. Y. YANG, X. C. YANG, G. C. YU, A. F. YUAN, M. ZHA, H. M. ZHANG, L. ZHANG, P. ZHANG, X. Y. ZHANG, Y. ZHANG, ZHAXISANGZHU, X. X. ZHOU, F. R. ZHU, Q. Q. ZHU, ROME U, TOR VERGATA INFN, ROME ROME III U. INFN, ROME NAPLES U. INFN, NAPLES LECCE U. INFN, LECCE BEIJING, I.N.S.T. HIGH ENERGY P.H.Y.S. HEBEI NORMAL U. IASF, PALERMO INFN, CATANIA YUNNAN U. TIBET U. PALERMO U. SHANDONG U. SICHUAN U. PAVIA U. INFN, PAVIA IFSI, TURIN INFN, TURIN, DE VINCENZI, Mario, G., Aielli, C., Bacci, B., Bartoli, P., Bernardini, X. J., Bi, C., Bleve, Bussino, Severino Angelo Maria, A. K., CALABRESE MELCARNE, P., Camarri, D., Campana, Z., Cao, R., Cardarelli, S., Catalanotti, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, Danzengluobu, X. H., Ding, G., D'ALI STAITI, B., D'ETTORRE PIAZZOLI, E., DE MARINIS, I., DE MITRI, DE VINCENZI, Mario, T., DI GIROLAMO, G., DI SCIASCIO, C. F., Feng, ZHAO YANG, Feng, ZHEN YONG, Feng, C., Ferrigno, X. Y., Gao, Q. B., Gou, H. H., He, HONG BO, Hu, HAI BING, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, Labaciren, J. Y., Li, H. J., Li, B., Liberti, G., Ligouri, C. Q., Liu, J., Liu, H., Lu, G., Mancarella, Mari, Stefano Maria, G., Marsella, D., Martello, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, M., Panareo, L., Perrone, P., Pistilli, X. B., Qu, E., Reali, E., Rossi, B., Sacco, L., Saggese, P., Salvini, A., Segreto, R., Santonico, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, H., Wang, Y. G., Wang, C. Y., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, Zhaxisangzhu, X. X., Zhou, F. R., Zhu, Q. Q., Zhu, Rome, U, TOR VERGATA, Infn, ROME ROME III U., Infn, ROME NAPLES U., Infn, NAPLES LECCE U., Infn, Lecce, Beijing, Iasf, I. N. S. T. HIGH ENERGY P. H. Y. S. HEBEI NORMAL U., Palermo, Infn, CATANIA YUNNAN U. TIBET U. PALERMO U. SHANDONG U. SICHUAN U. PAVIA U., Infn, Pavia, Ifsi, Turin, Infn, and Turin

Published
2007

50. First results on the angular resolution of the ARGO-YBJ detector

Author

G. Aielli, C. Bacci, F. Barone, B. Bartoli, X. J. Bi, C. Bleve, P. Branchini, A. Budano, S. Bussino, A. K. Calabrese Melcarne, P. Camarri, Z. Cao, A. Cappa, R. Cardarelli, S. Catalanotti, C. Cattaneo, S. Cavaliere, P. Celio, S. Z. Chen, N. Cheng, P. Creti, S. W. Cui, G. Cusumano, B. Z. Dai, G. D’Alí Staiti, Danzengluobu, M. Dattoli, R. De Rosa, B. D’Ettorre Piazzoli, M. De Vincenzi, T. Di Girolamo, X. H. Ding, G. Di Sciascio, C. F. Feng, Zhaoyang Feng, Zhenyong Feng, C. Ferrigno, F. Galeazzi, P. Galeotti, X. Y. Gao, R. Gargana, F. Garufi, Q. B. Gou, H. H. He, Haibing Hu, Hongbo Hu, Q. Huang, M. Iacovacci, I. James, H. Y. Jia, Labaciren, H. J. Li, J. Y. Li, B. Liberti, G. Liguori, C. Q. Liu, J. Liu, H. Lu, S. M. Mari, S. Mastroianni, X. R. Meng, J. Mu, L. Nicastro, C. C. Ning, L. Palummo, P. Pistilli, X. B. Qu, E. Rossi, F. Ruggieri, L. Saggese, P. Salvini, R. Santonico, A. Segreto, P. R. Shen, X. D. Sheng, F. Shi, C. Stanescu, A. Surdo, Y. H. Tan, P. Vallania, S. Vernetto, C. Vigorito, H. Wang, Y. G. Wang, C. Y. Wu, H. R. Wu, B. Xu, L. Xue, H. T. Yang, Q. Y. Yang, X. C. Yang, G. C. Yu, A. F. Yuan, M. Zha, H. M. Zhang, J. L. Zhang, L. Zhang, P. Zhang, X. Y. Zhang, Y. Zhang, Zhaxisangzhu, X. X. Zhou, F. R. Zhu, Q. Q. Zhu, BERNARDINI, Paolo, DE MITRI, Ivan, MANCARELLA, Giovanni, MARSELLA, GIOVANNI, MARTELLO, Daniele, PANAREO, Marco, PERRONE, Lorenzo, C., Baccia, K. Z., Baob, F., Baronec, B., Bartolic, P., Bernardinid, S., Bussinoa, E., Callonic, B. Y., Caoe, R., Cardarellif, S., Catalanottic, S., Cavalierec, F., Cesaronid, P., Cretid, Danzengluobug, B., D’Ettorrepiazzolic, M., De Vincenzia, T., Di Girolamoc, G., Di Sciascioc, Z. Y., Fengh, Y., Fue, X. Y., Gaoi, Q. X., Gengi, H. W., Guog, H. H., Hej, M., Hee, Q., Huangh, M., Iacovaccic, N., Iuccia, H. Y., Jaih, C. L., Jingj, F. M., Konge, H. H., Kuangj, Labacireng, B., Lib, J. Y., Lie, Z. Q., Liui, H., Luj, X. H., Maj, G., Mancarellad, Mari, Stefano Maria, A, G., Marsellad, D., Martellod, X. R., Mengg, L., Milanoc, J., Mui, M., Panareod, Z. R., Pengj, P., Pistillia, L., Saggesec, R., Santonicof, P. R., Shenj, C., Stanescua, L. R., Sunb, S. C., Sunb, A., Surdod, Y. H., Tanj, S., Vernettok, C. R., Wange, H., Wangj, H. Y., Wangj, Y. N., Weib, H. T., Yangj, Q. K., Yaob, G. C., Yuh, X. D., Yueb, A. F., Yuang, M., Zhaj, H. M., Zhangj, J. L., Zhangj, N. J., Zhange, X. Y., Zhange, Zhaxisangzhug, Zhaxicireng, Q. Q., Zhuj, Aielli, G, Bacci, C, Bartoli, B, Bernardini, P, Bi, Xj, Bleve, C, Branchini, P, Budano, A, Bussino, Severino Angelo Maria, Calabrese Melcarne, Ak, Camarri, P, Cao, Z, Cappa, A, Cardarelli, R, Catalanotti, S, Cattaneo, C, Celio, P, Chen, Sz, Chen, Tl, Chen, Y, Cheng, N, Creti, P, Cui, Sw, Dai, Bz, D'Ali Staiti, G, Danzengluobu, Dattoli, M, De Mitri, I, D'Ettorre Piazzoli, B, De Vincenzi, M, Di Girolamo, T, Ding, Xh, Di Sciascio, G, Feng, Cf, Feng Zhao, Yang, Feng Zhen, Yong, Galeazzi, F, Galeotti, P, Gargana, R, Gou, Qb, Guo, Yq, He, Hh, Hu, Haibing, Hu Hong, Bo, Huang, Q, Iacovacci, M, Iuppa, R, James, I, Jia, Hy, Labaciren, Li, Hj, Li, Jy, Li, Xx, Liberti, B, Liguori, G, Liu, C, Liu, Cq, Liu, My, Liu, J, Lu, H, Ma, Xh, Mancarella, G, Marsella, G, Martello, D, Mastroianni, S, Meng, Xr, Montini, P, Ning, Cc, Pagliaro, A, Panareo, M, Perrone, L, Pistilli, P, Qu, Xb, Rossi, E, Ruggieri, F, Saggese, L, Salvini, P, Santonico, R, Shen, Pr, Sheng, Xd, Shi, F, Stanescu, C, Surdo, A, Tan, Yh, Vallania, P, Vernetto, S, Vigorito, C, Wang, B, Wang, H, Wu, Cy, Wu, Hr, Xu, B, Xue, L, Yan, Yx, Yang, Qy, Yang, Xc, Yuan, Af, Zha, M, Zhang, Hm, Zhang Ji, Long, Zhang Jian, Li, Zhang, L, Zhang, P, Zhang, Xy, Zhang, Y, Zhaxisangzhu, Zhou, Xx, Zhu, Fr, Zhu, Qq, Zizzi, G., G., Aielli, C., Bacci, F., Barone, B., Bartoli, Bernardini, Paolo, X. J., Bi, C., Bleve, P., Branchini, A., Budano, S., Bussino, A. K., Calabrese Melcarne, P., Camarri, Z., Cao, A., Cappa, R., Cardarelli, S., Catalanotti, C., Cattaneo, S., Cavaliere, P., Celio, S. Z., Chen, N., Cheng, P., Creti, S. W., Cui, G., Cusumano, B. Z., Dai, G., D’Alí Staiti, M., Dattoli, DE MITRI, Ivan, R., De Rosa, B., D’Ettorre Piazzoli, M., De Vincenzi, T., Di Girolamo, X. H., Ding, G., Di Sciascio, C. F., Feng, Zhaoyang, Feng, Zhenyong, Feng, C., Ferrigno, F., Galeazzi, P., Galeotti, X. Y., Gao, R., Gargana, F., Garufi, Q. B., Gou, H. H., He, Haibing, Hu, Hongbo, Hu, Q., Huang, M., Iacovacci, I., Jame, H. Y., Jia, H. J., Li, J. Y., Li, B., Liberti, G., Liguori, C. Q., Liu, J., Liu, H., Lu, Mancarella, Giovanni, S. M., Mari, Marsella, Giovanni, Martello, Daniele, S., Mastroianni, X. R., Meng, J., Mu, L., Nicastro, C. C., Ning, L., Palummo, Panareo, Marco, Perrone, Lorenzo, P., Pistilli, X. B., Qu, E., Rossi, F., Ruggieri, L., Saggese, P., Salvini, R., Santonico, A., Segreto, P. R., Shen, X. D., Sheng, F., Shi, C., Stanescu, A., Surdo, Y. H., Tan, P., Vallania, S., Vernetto, C., Vigorito, H., Wang, Y. G., Wang, C. Y., Wu, H. R., Wu, B., Xu, L., Xue, H. T., Yang, Q. Y., Yang, X. C., Yang, G. C., Yu, A. F., Yuan, M., Zha, H. M., Zhang, J. L., Zhang, L., Zhang, P., Zhang, X. Y., Zhang, Y., Zhang, X. X., Zhou, F. R., Zhu, and Q. Q., Zhu

Subjects
History, Geography, Extended Air shower, Detector, Air shower array, Angular resolution, Cosmic Ray, Extensive Air Shower, Array Detector, Angular Resolution, Cartography, Argo, Computer Science Applications, Education, Remote sensing, Argo-Ybj
Abstract

We present the first results on the angular resolution of the ARGO-YBJ detector in data taking at the Yangbajing Laboratory (Tibet, People's Republic of China, 4300 m a.s.l.).

Published
2006

Catalog

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