Search for the Anisotropies of cosmic ray electrons using LHAASO-WCDA
July 25, 2023
Anisotropies of Cosmic Ray Electrons (CREs) above TeV energies are ideal probe of nearby electron accelerators due to the short propagation length of high-energy CREs. The Water Cherenkov Detector Array (WCDA) of the Large High Altitude Air Shower Observatory (LHAASO) is a survey type detector for cosmic rays and gamma rays above $\sim100$ GeV with a large field-of-view and a high duty cycle. The strong gamma/hadron separation capability and the large effective area of the WCDA make it a powerful detector of CREs whose fluxes are more than 1000 times lower than nuclei. Using 2 years of data collected by the WCDA with energies from several hundred GeV to tens of TeV, we search for possible anisotropies of CREs. The cosmic ray background in the CRE sample is studied carefully with simulations and the gamma-ray observations of crab nebula.
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