PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
Observation of cosmic ray anisotropy with GRAPES-3 Experiment
P. Mohanty,* S. Ahmad, M. Chakraborty, A. Chandra, S.R. Dugad, S.K. Gupta, B. Hariharan, Y. Hayashi, P. Jagadeesan, A. Jain, P. Jain, V.B. Jhansi, S. Kawakami, H. Kojima, S. Mahapatra, S.D. Morris, P.K. Nayak, A. Oshima, D. Pattanaik, P.S. Rakshe, K. Ramesh, B.S. Rao, L.V. Reddy, S. Shibata, F. Warsi, M. Zuberi et al. (click to show)
*corresponding author
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Pre-published on: July 22, 2019
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Abstract
Large scale anisotropy of cosmic rays in the TeV-PeV energy region has been reported by several experiments located in the Northern Hemisphere as well as by the IceCube, and its surface array IceTop at the South Pole. The GRAPES-3 experiment in Ooty, India is designed to observe cosmic rays in the energy range from a few TeV to over 10 PeV. Its near-equatorial location (11.4$^{\circ}$N) provides a unique advantage of its observations on cosmic ray anisotropy, overlapping with experiments in both the hemispheres. The GRAPES-3 consists of a dense array of 400 plastic scintillator detectors spread over an area of 25000 m$^2$. It also contains a large area (560 m$^2$) tracking muon detector which provides an excellent capability to discriminate $\gamma$-rays against cosmic rays. It has recorded more than 10 billion showers since its operation began in 2000. Measurements of cosmic ray anisotropy with a subset of this data is presented here.

DOI: https://doi.org/10.22323/1.358.0354
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