The Anisotropy of CRs Observed by YBJ-HA Experiment

The Yangbajing Hybrid Array(YBJ-HA) has accumulated over 0.8 billion cosmic-ray events from December 2016 to June 2018, which is a test array for Large High Altitude Air Shower Observatory Square Kilometer Array(LHAASO-KM2A). The large-scale anisotropy is observed by using this data. The global sidereal anisotropy exhibits an excess and a deficit with an amplitude of ∼ 10^3 at the median energy of 15TeV, and there is no time dependence of the structure discovered during the operation. Besides, the observed variations in the anti-sidereal and extendedsidereal time frames are at the level of ∼ 10^−5, which ensure the precise measurement of the sidereal anisotropy.