Year: 2025
Type: conference-paper
Abstract: Cosmic ray anisotropy at various scales has been observed over the past decade by multiple experiments in both the Northern and Southern Hemispheres. The GRAPES-3 experiment, located at 11.4 degrees North, is well positioned to study a significant portion of both hemispheres, covering nearly 70 percent of the sky at TeV energies. Observing large-scale anisotropy is particularly challenging since the effect is extremely small, measuring less than 0.1%, while detector and atmospheric influences can reach up to 5% and must be carefully mitigated. Using one year of data collected by GRAPES-3 between January 1, 2013, and December 31, 2013, we apply the iterative maximum likelihood method to extract the large-scale anisotropy. The detection significance reaches 6 standard deviations. The results, along with a comparison to findings from other experiments, are described in this proceeding.
DOI: 10.22323/1.501.0216
Authors: Medha Chakraborty, P.K. Mohanty, S.R. Dugad, S.K. Gupta, B. Hariharan, Y. Hayashi, P. Jagadeesan, A. Jain, S. Kawakami, P.K. Nayak, A. Oshima, D. Pattanaik, M. Rameez, K. Ramesh, M. Talwar, F. Varsi
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414420676