Speaker
Description
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 four years of data collected by GRAPES-3 between January 1, 2013, and December 31, 2016, we apply the iterative maximum likelihood method to extract the large-scale anisotropy. The detection significance exceeds 10 standard deviations. The results, along with a comparison to findings from other experiments, will be presented at the conference.
| Collaboration(s) | GRAPES-3 |
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